{"id":2900,"date":"2026-07-20T15:39:18","date_gmt":"2026-07-20T13:39:18","guid":{"rendered":"https:\/\/gekkophotonics.com\/specialty-silicones\/what-we-measure\/"},"modified":"2026-07-20T15:39:18","modified_gmt":"2026-07-20T13:39:18","slug":"what-we-measure","status":"publish","type":"page","link":"https:\/\/gekkophotonics.com\/de\/specialty-silicones\/was-wir-messen-inline-raman-silikon\/","title":{"rendered":"What We Measure &#8211; Inline Raman for Silicone Processes | Gekko Photonics"},"content":{"rendered":"<style>.elementor-2900 .elementor-element.elementor-element-cd26412{margin-top:0px;margin-bottom:0px;padding:0px 0px 0px 0px;}.elementor-2900 .elementor-element.elementor-element-fb1892d > .elementor-element-populated{padding:0px 0px 0px 0px;}@media(min-width:768px){.elementor-2900 .elementor-element.elementor-element-fb1892d{width:100%;}}<\/style>\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2900\" class=\"elementor elementor-2900 elementor-bc-flex-widget\" 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img{width:100%;height:100%;object-fit:cover}\n\n\/* ---- analyte + spectrum explorer ---- *\/\n#gkms .explorer{display:grid;grid-template-columns:1fr 1.15fr;gap:40px;align-items:stretch}\n@media(max-width:900px){#gkms .explorer{grid-template-columns:1fr}}\n#gkms .analyte-list{display:flex;flex-direction:column;gap:10px}\n#gkms .analyte{display:flex;justify-content:space-between;align-items:center;gap:14px;text-align:left;font-family:var(--font);\n  background:#fff;border:1px solid var(--g200);border-radius:var(--r-md);padding:16px 18px;cursor:pointer;transition:.18s var(--ease)}\n#gkms .analyte:hover{border-color:var(--gk-blue-400);transform:translateX(3px)}\n#gkms .analyte.active{border-color:var(--gk-blue);background:var(--gk-blue-50);box-shadow:var(--sh-sm)}\n#gkms .analyte .n{font-weight:700;color:var(--gk-navy-deep);font-size:15px}\n#gkms .analyte .band{font-size:12px;font-weight:700;color:var(--gk-blue);font-variant-numeric:tabular-nums;background:var(--gk-blue-100);padding:3px 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auto;width:46px;height:46px;border-radius:12px;background:var(--gk-blue-50);color:var(--gk-blue);display:flex;align-items:center;justify-content:center;font-size:22px}\n#gkms .how-point h4{font-size:18px;color:var(--gk-navy-deep);margin-bottom:5px}\n#gkms .how-point p{font-size:15px;color:var(--gk-slate);line-height:1.55}\n\n\/* ---- metric band ---- *\/\n#gkms .band{background:linear-gradient(120deg,#141F30 0%,var(--gk-navy-dark) 55%,#1B3048 100%);color:#fff;position:relative;overflow:hidden}\n#gkms .band::before{content:\"\";position:absolute;inset:0;pointer-events:none;\n  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);\n  background-size:56px 56px;mask-image:radial-gradient(70rem 40rem at 30% 0%,#000 0%,transparent 70%)}\n#gkms .band .wrap{position:relative}\n#gkms .band .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:32px}\n@media(max-width:820px){#gkms .band 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.25s var(--ease);display:flex;flex-direction:column}\n#gkms .proof:hover{box-shadow:var(--sh-lg);transform:translateY(-4px);border-color:var(--gk-blue-100)}\n#gkms .proof .pph{aspect-ratio:16\/10;background:var(--g100);overflow:hidden;position:relative}\n#gkms .proof .pph img{width:100%;height:100%;object-fit:cover;transition:transform .55s var(--ease)}\n#gkms .proof:hover .pph img{transform:scale(1.045)}\n#gkms .proof .pph .ptag{position:absolute;left:14px;top:14px;font-size:10.5px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:#fff;background:rgba(15,22,38,.72);backdrop-filter:blur(6px);padding:6px 11px;border-radius:var(--r-pill)}\n#gkms .proof .pbody{padding:24px 24px 26px;display:flex;flex-direction:column;flex:1}\n#gkms .proof h4{color:var(--gk-navy-deep);font-size:18px;line-height:1.25;margin:0 0 12px}\n#gkms .proof p{font-size:14px;color:var(--gk-slate);line-height:1.62}\n#gkms .proof p b{color:var(--gk-navy-deep);font-variant-numeric:tabular-nums}\n\n\/* ---- duel ---- *\/\n#gkms .duel{background:#fff;border:1px solid var(--g100);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-md)}\n#gkms .duel-row{display:grid;grid-template-columns:1fr 1.15fr;align-items:stretch}\n#gkms .duel-row .mid{display:none}\n#gkms .duel-row .old,#gkms .duel-row .new{padding:18px 28px;font-size:15px;display:flex;align-items:center}\n#gkms .duel-row .old{color:var(--g500);background:var(--g50);border-bottom:1px solid var(--g100)}\n#gkms .duel-row .new{color:var(--gk-navy-deep);font-weight:600;background:var(--gk-blue-50);border-bottom:1px solid rgba(1,159,226,.14);border-left:2px solid var(--gk-blue)}\n#gkms .duel-row:last-child .old{border-bottom:none}\n#gkms .duel-row:last-child .new{border-bottom:none}\n#gkms .duel-row.duel-head .old,#gkms .duel-row.duel-head .new{font-weight:800;text-transform:uppercase;font-size:12px;letter-spacing:.1em;padding-top:20px;padding-bottom:20px}\n#gkms .duel-row.duel-head .old{background:var(--g100);color:var(--g500)}\n#gkms .duel-row.duel-head .new{background:var(--gk-navy-deep);color:#fff;border-bottom:none;border-left-color:var(--gk-navy-deep)}\n#gkms .duel .ck{color:var(--gk-blue);font-weight:800;margin-right:10px}\n#gkms .duel .xk{color:var(--g300);font-weight:800;margin-right:10px}\n@media(max-width:720px){#gkms .duel-row{grid-template-columns:1fr}#gkms .duel-row .old{border-bottom:1px dashed var(--g200)}}\n\n\/* ---- compliance ---- *\/\n#gkms .reg-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}\n@media(max-width:820px){#gkms .reg-grid{grid-template-columns:1fr}}\n#gkms .reg{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:var(--r-lg);padding:24px}\n#gkms .reg .flag{display:inline-block;font-size:11px;font-weight:800;letter-spacing:.06em;padding:5px 11px;border-radius:6px;background:var(--gk-blue);color:#fff;text-transform:uppercase;margin-bottom:14px}\n#gkms .reg h4{font-size:17px;color:#fff;margin-bottom:6px}\n#gkms .reg p{font-size:14px;color:#C8D0DC;line-height:1.55}\n\n\/* ---- replace ---- *\/\n#gkms .repl{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}\n@media(max-width:720px){#gkms .repl{grid-template-columns:1fr}}\n#gkms .repl .item{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--g100);border-radius:var(--r-md);padding:18px 20px}\n#gkms .repl .lag{flex:0 0 auto;font-size:12px;font-weight:800;color:var(--bad);background:#FDE9E9;padding:5px 10px;border-radius:6px;white-space:nowrap}\n#gkms .repl .m{font-weight:700;color:var(--gk-navy-deep);font-size:15px}\n#gkms .repl .s{font-size:13px;color:var(--gk-slate);margin-top:3px}\n\n\/* ---- product ---- *\/\n#gkms .product{display:grid;grid-template-columns:.95fr 1.05fr;gap:48px;align-items:center}\n@media(max-width:900px){#gkms .product{grid-template-columns:1fr}}\n#gkms .prod-photo{background:radial-gradient(60% 55% at 50% 42%,#101321 0%,#010105 72%);border-radius:var(--r-xl);padding:36px 20px;box-shadow:var(--sh-lg);text-align:center;border:1px solid rgba(255,255,255,.06);position:relative;overflow:hidden}\n#gkms .prod-photo::after{content:\"\";position:absolute;left:10%;right:10%;bottom:0;height:1px;background:linear-gradient(90deg,transparent,rgba(1,159,226,.45),transparent)}\n#gkms .prod-photo img{margin:0 auto;max-height:460px;width:auto;position:relative}\n#gkms .spec-table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--g100);margin-top:22px}\n#gkms .spec-table td{padding:12px 18px;font-size:14px;border-bottom:1px solid var(--g100)}\n#gkms .spec-table tr:last-child td{border-bottom:none}\n#gkms .spec-table td:first-child{font-weight:600;color:var(--gk-navy-deep);width:44%}\n#gkms .spec-table td:last-child{color:var(--gk-slate)}\n\n\/* ---- CTA ---- *\/\n#gkms .cta{background:linear-gradient(135deg,#019FE2 0%,#2B2E83 100%);color:#fff;border-radius:var(--r-xl);padding:64px 48px;text-align:center;position:relative;overflow:hidden}\n#gkms .cta::after{content:\"\";position:absolute;inset:0;background:radial-gradient(40rem 20rem at 80% 120%,rgba(243,201,105,.18),transparent 60%);pointer-events:none}\n#gkms .cta .h2{color:#fff;max-width:20ch;margin:14px auto 0;position:relative}\n#gkms .cta p{color:rgba(255,255,255,.92);max-width:58ch;margin:16px auto 0;position:relative;font-size:17px;line-height:1.6}\n#gkms .cta .hero-cta{justify-content:center;margin-top:30px;position:relative}\n#gkms .cta .sub{margin-top:18px;font-size:13px;color:rgba(255,255,255,.82);position:relative}\n\n\/* ---- workshop strip (secondary, demoted) ---- *\/\n#gkms .strip{background:var(--gk-off);border-top:1px solid var(--g100);border-bottom:1px solid var(--g100)}\n#gkms .strip-in{display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;padding:34px 0}\n#gkms .strip .st-l{display:flex;align-items:center;gap:16px}\n#gkms .strip .st-ic{width:48px;height:48px;border-radius:12px;background:var(--gk-blue-50);color:var(--gk-blue);display:flex;align-items:center;justify-content:center;font-size:24px;flex:0 0 auto}\n#gkms .strip h4{font-size:18px;color:var(--gk-navy-deep)}\n#gkms .strip p{font-size:14px;color:var(--gk-slate);margin-top:2px}\n\n\/* ---- footer ---- *\/\n#gkms .foot{background:var(--black);color:#C8D0DC;padding:72px 0 30px}\n#gkms .foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:36px}\n@media(max-width:820px){#gkms .foot-grid{grid-template-columns:1fr 1fr}}\n#gkms .foot .flogo{height:42px;width:auto;filter:brightness(0) invert(1);margin-bottom:18px}\n#gkms .foot .ftag{font-size:14px;color:#8A93A0;line-height:1.6;max-width:34ch}\n#gkms .foot h5{font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--gk-blue);margin-bottom:16px}\n#gkms .foot a{display:block;font-size:13px;color:#C8D0DC;line-height:2}\n#gkms .foot a:hover{color:var(--gk-blue-400)}\n#gkms .foot .addr{font-size:13px;color:#8A93A0;line-height:1.7;margin-top:4px}\n#gkms .foot .fbottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;margin-top:52px;padding-top:24px;border-top:1px solid rgba(255,255,255,.08);font-size:12px;color:#5E6676}\n#gkms .foot .fbottom .tagpl{color:var(--gk-blue);font-weight:700;letter-spacing:.14em;text-transform:uppercase}\n#gkms .mono-note{font-size:12px;color:var(--g400)}\n\n\/* ---- feasibility request form (custom, posts to gekko\/v1\/rsvp) ---- *\/\n#gkms .gkms-form{max-width:560px;margin:28px auto 0;text-align:left;position:relative}\n#gkms .gkms-form-q{font-weight:700;font-size:14px;color:#fff;margin:0 0 12px;text-align:center}\n#gkms .gkms-choices{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:14px}\n#gkms .gkms-opt{display:flex;align-items:center;justify-content:center;text-align:center;gap:8px;padding:13px 10px;border:1.5px solid rgba(255,255,255,.34);border-radius:var(--r-md);background:rgba(255,255,255,.08);color:#fff;font-family:var(--font);font-weight:600;font-size:14px;line-height:1.25;cursor:pointer;transition:.15s var(--ease)}\n#gkms .gkms-opt:hover{border-color:#fff;background:rgba(255,255,255,.16)}\n#gkms .gkms-opt.is-sel{background:#fff;color:var(--gk-navy-deep);border-color:#fff}\n#gkms .gkms-row{display:flex;gap:10px;flex-wrap:wrap}\n#gkms .gkms-email{flex:1 1 240px;min-width:0;padding:14px 15px;height:auto;line-height:1.4;border:1.5px solid rgba(255,255,255,.34);border-radius:var(--r-md);background:rgba(255,255,255,.96);color:var(--gk-navy-deep);font-family:var(--font);font-size:15px}\n#gkms .gkms-email::placeholder{color:var(--g400)}\n#gkms .gkms-email:focus{outline:none;border-color:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.25)}\n#gkms .gkms-submit{flex:0 0 auto;box-shadow:0 6px 18px rgba(13,13,13,.18)}\n#gkms .gkms-hp{position:absolute!important;left:-9999px!important;top:auto;width:1px;height:1px;overflow:hidden;opacity:0}\n#gkms .gkms-consent{display:flex;align-items:flex-start;gap:10px;margin:14px 0 0;font-size:12.5px;color:rgba(255,255,255,.9);line-height:1.5;cursor:pointer;text-align:left}\n#gkms .gkms-consent-cb{flex:none;width:18px;height:18px;margin-top:1px;accent-color:#fff;cursor:pointer}\n#gkms .gkms-consent a{color:#fff;text-decoration:underline}\n#gkms .gkms-req{color:var(--gk-gold)}\n#gkms .gkms-msg{margin:12px 0 0;font-size:14px;min-height:1px;text-align:center;color:#fff}\n#gkms .gkms-msg.err{color:#FFDADA}\n#gkms .gkms-done{max-width:560px;margin:28px auto 0;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.30);border-radius:var(--r-lg);padding:24px;text-align:center;color:#fff;font-size:16px;font-weight:600;line-height:1.5}\n#gkms .cta-alt{margin-top:20px;position:relative}\n#gkms .cta-alt a{color:#fff;font-weight:600;font-size:14px;text-decoration:none;border-bottom:1px solid rgba(255,255,255,.5);padding-bottom:2px}\n#gkms .cta-alt a:hover{border-color:#fff}\n@media(max-width:560px){#gkms .gkms-choices{grid-template-columns:1fr}}\n\n\/* ---- inline line icons (replacing emoji) ---- *\/\n#gkms .ci svg{width:28px;height:28px;display:block;color:#DCE4EF}\n#gkms .cyc-step.on .ci svg{color:#fff}\n#gkms .how-point .hi svg{width:24px;height:24px;display:block}\n#gkms .strip .st-ic svg{width:26px;height:26px;display:block}\n#gkms .gkms-hint{margin:0 0 16px;font-size:13px;color:rgba(255,255,255,.88);line-height:1.55;text-align:center}\n#gkms .gkms-submit{transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease)}\n#gkms .gkms-submit.is-check{background:var(--ok);border-color:var(--ok);color:#fff;pointer-events:none}\n#gkms .gkms-submit svg{width:18px;height:18px;flex:0 0 auto;margin-right:2px}\n\n\n\/* ---- multi-page additions ---- *\/\n#gkms .subhero{position:relative;overflow:hidden;color:#fff;padding:120px 0 72px;\n  background:linear-gradient(115deg,#0F1626 0%,#192A3D 55%,#1F2A4A 100%)}\n#gkms .subhero .spectrum{position:absolute;inset:0;width:100%;height:100%;opacity:.20;pointer-events:none}\n#gkms .subhero .display{color:#fff;max-width:22ch;font-size:clamp(34px,4.4vw,54px)}\n#gkms .subhero .display .accent{color:var(--gk-blue-400)}\n#gkms .subhero .lead{color:#C8D0DC;max-width:62ch;margin-top:18px}\n#gkms .subhero .eyebrow{color:var(--gk-blue-400)}\n#gkms .subhero .eyebrow::before{background:var(--gk-blue-400)}\n#gkms .crumb{font-size:13px;color:#8A93A0;margin-bottom:18px}\n#gkms .crumb a{color:#C8D0DC}\n#gkms .crumb a:hover{color:#fff}\n#gkms .teaser-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:44px}\n#gkms a.teaser{display:flex;flex-direction:column;background:#fff;border:1px solid var(--g100);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-sm);transition:.2s var(--ease);color:inherit}\n#gkms a.teaser:hover{transform:translateY(-3px);box-shadow:var(--sh-md);border-color:var(--gk-blue-100)}\n#gkms .teaser .tph{height:230px;overflow:hidden}\n#gkms .teaser .tph img{width:100%;height:100%;object-fit:cover}\n#gkms .teaser .tbody{padding:20px 22px 22px}\n#gkms .teaser .tk{font-size:11px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--gk-blue);margin-bottom:8px}\n#gkms .teaser h3{font-size:18px;color:var(--gk-navy-deep);margin-bottom:6px}\n#gkms .teaser p{font-size:14px;color:var(--gk-slate);line-height:1.55}\n#gkms .teaser .tgo{margin-top:auto;padding-top:14px;font-size:13.5px;font-weight:700;color:var(--gk-blue)}\n@media(max-width:940px){#gkms .teaser-grid{grid-template-columns:1fr}}\n#gkms .pager{display:flex;justify-content:space-between;gap:14px;max-width:1200px;margin:0 auto;padding:34px 24px}\n#gkms .pager a{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:var(--gk-navy-deep)}\n#gkms .pager a:hover{color:var(--gk-blue)}\n\/* ---- packshot rule: no frame, no background, full device visible ---- *\/\n#gkms .prod-photo{background:none;border:none;box-shadow:none;padding:0;border-radius:0;overflow:visible}\n#gkms .prod-photo::after{display:none}\n#gkms .prod-photo img{max-height:560px;max-width:100%;width:auto;object-fit:contain}\n#gkms .packshot-stage{background:none;border:0;box-shadow:none;padding:0;text-align:center}\n#gkms .packshot-stage img{max-width:100%;height:auto;max-height:520px;object-fit:contain;filter:drop-shadow(0 24px 42px rgba(25,42,61,.28))}\n#gkms .tabpanel.active:not(:has(img)){grid-template-columns:1fr!important;max-width:840px}\n#gkms .product:not(:has(img)){grid-template-columns:1fr!important;max-width:840px}\n#gkms .how-grid:not(:has(img)):not(:has(.cycle)){grid-template-columns:1fr!important;max-width:840px}\n\/* ---- click-to-load YouTube facade ---- *\/\n#gkms .vid-embed{position:relative;width:100%;aspect-ratio:16\/9;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-md);background:#0F1626}\n#gkms .vid-embed .yt-facade{display:block;width:100%;height:100%;margin:0;padding:0;border:0;cursor:pointer;background:#0F1626;position:relative}\n#gkms .vid-embed .yt-facade img{width:100%;height:100%;object-fit:cover;display:block}\n#gkms .vid-embed .yt-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}\n#gkms .vid-embed .yt-play svg{width:74px;height:auto;filter:drop-shadow(0 6px 16px rgba(0,0,0,.45));transition:transform .18s var(--ease)}\n#gkms .vid-embed .yt-facade:hover .yt-play svg,#gkms .vid-embed .yt-facade:focus-visible .yt-play svg{transform:scale(1.09)}\n#gkms .vid-embed iframe{position:absolute;inset:0;width:100%;height:100%;border:0;display:block}\n\n<\/style>\n\n<div id=\"gkms\">\n<div id=\"gkms-progress\" style=\"position:fixed;top:0;left:0;height:3px;background:var(--gk-blue);width:0;z-index:200\"><\/div>\n<nav class=\"nav\">\n    <div class=\"nav-in\">\n      <a href=\"\/specialty-silicones\/\"><img decoding=\"async\" class=\"logo\" src=\"https:\/\/gekkophotonics.com\/wp-content\/uploads\/2026\/07\/logo-full-4.png\" alt=\"Gekko Photonics\"><\/a>\n      <div class=\"nav-links\">\n      <a href=\"\/specialty-silicones\/\">Home<\/a>\n      <a href=\"\/specialty-silicones\/chemistry\/\">Chemistry<\/a>\n      <a href=\"\/specialty-silicones\/what-we-measure\/\" class=\"active\">What we measure<\/a>\n      <a href=\"\/specialty-silicones\/how-it-works\/\">How it works<\/a>\n      <a href=\"\/specialty-silicones\/proof\/\">Proof<\/a>\n      <a href=\"\/specialty-silicones\/compliance\/\">Compliance<\/a>\n      <a href=\"\/specialty-silicones\/instrument\/\">Instrument<\/a>\n      <\/div>\n      <a class=\"btn btn-primary\" href=\"#contact\">Test on your samples<\/a>\n    <\/div>\n  <\/nav>\n<header class=\"subhero\">\n  <svg class=\"spectrum\" viewBox=\"0 0 1200 420\" preserveAspectRatio=\"none\" aria-hidden=\"true\">\n    <path d=\"M0,320 L90,312 L150,290 L195,195 L240,305 L315,292 L375,185 L420,305 L480,262 L540,135 L600,290 L660,276 L720,225 L780,296 L840,282 L900,205 L960,300 L1020,288 L1080,240 L1140,292 L1200,270\" fill=\"none\" stroke=\"#019FE2\" stroke-width=\"2\"><\/path>\n    <path d=\"M0,335 L90,328 L150,318 L195,245 L240,325 L315,312 L375,232 L420,322 L480,292 L540,196 L600,312 L660,300 L720,258 L780,318 L840,305 L900,242 L960,320 L1020,308 L1080,272 L1140,314 L1200,295\" fill=\"none\" stroke=\"#fff\" stroke-width=\"1\" stroke-dasharray=\"4 6\"><\/path>\n  <\/svg>\n  <div class=\"hero-in\" style=\"position:relative\">\n    <div class=\"crumb\"><a href=\"\/specialty-silicones\/\">Industrial &amp; specialty silicones<\/a> \/ What we measure<\/div>\n    <span class=\"eyebrow\">What we measure<\/span>\n    <h1 class=\"display\" style=\"margin-top:16px\">The properties that <span class=\"accent\">define a silicone<\/span> - read in the reactor.<\/h1>\n    <p class=\"lead\">Chain length, silanol and vinyl content, residual cyclics and cure state are what separate one silicone grade from the next. Spectrally reads them inline - inside the reactor or line, continuously, without pulling a sample - from the diagnostic Raman bands of the siloxane backbone, Si-H and vinyl C=C.<\/p>\n  <\/div>\n<\/header>\n\n<!-- ===== 01 \u00b7 OVERVIEW ===== -->\n  <section id=\"overview\">\n    <div class=\"wrap\">\n      <div class=\"sec-head reveal\">\n        <span class=\"num\">01<\/span>\n        <span class=\"eyebrow\">What we measure<\/span>\n        <h2 class=\"h2\">One spectrum in. Six process values out.<\/h2>\n        <p class=\"lead\">Across PDMS, addition-cure LSR\/HCR, chlorosilane and medical-grade silicone processes, the batch decision reduces to a handful of composition and cure values - and most of them still come back from the lab after the reaction has moved on. All six live in the Raman spectrum of the reaction mixture. Each is extracted by its own chemometric model, calibrated against your laboratory's reference values during feasibility.<\/p>\n      <\/div>\n      <div class=\"ctx-grid\">\n        <div class=\"ctx-item reveal\"><div class=\"k\">Source<\/div><div class=\"v\">One Raman spectrum<\/div><p>Laser excitation at 785 nm, with a 1064 nm variant for strongly fluorescent media. Spectral range 300-1650 or 300-3500 cm&#8315;&sup1; at 8 cm&#8315;&sup1; resolution.<\/p><\/div>\n        <div class=\"ctx-item reveal\"><div class=\"k\">Acquisition<\/div><div class=\"v\">From 5 seconds<\/div><p>A single acquisition takes from 5 s. The batch trajectory becomes a live curve instead of two or three lab points per cook.<\/p><\/div>\n        <div class=\"ctx-item reveal\"><div class=\"k\">Extraction<\/div><div class=\"v\">One model per parameter<\/div><p>AI\/advanced chemometrics with a CNN core in Spectrally OS, trained on your silicone matrix and recipes - the PLS\/PCA benchmark it is measured against, not a generic library calibration.<\/p><\/div>\n        <div class=\"ctx-item reveal\"><div class=\"k\">Delivery<\/div><div class=\"v\">Ordinary process tags<\/div><p>Values arrive in the PLC \/ DCS over PROFIBUS and PROFINET. Every measurement is stored and exportable as CSV, PDF or raw spectra.<\/p><\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- ===== ANALYTE + SPECTRUM EXPLORER ===== -->\n  <section id=\"measure\" class=\"ctx\">\n    <div class=\"wrap\">\n      <div class=\"sec-head reveal\">\n        <span class=\"num\">02<\/span>\n        <span class=\"eyebrow\">What Spectrally reads<\/span>\n        <h2 class=\"h2\">The properties that decide whether a silicone ships.<\/h2>\n        <p class=\"lead\">Each value is pulled straight from the Raman spectrum by a dedicated chemometric model. Select a parameter to see where it lives on the spectrum.<\/p>\n      <\/div>\n\n      <div class=\"explorer\">\n        <div class=\"analyte-list\" id=\"gkms-analytes\">\n          <button class=\"analyte active\" data-a=\"0\"><span class=\"n\">Siloxane chain length \/ DP<\/span><span class=\"band\">DP &middot; MW<\/span><\/button>\n          <button class=\"analyte\" data-a=\"1\"><span class=\"n\">Silanol (Si-OH) content<\/span><span class=\"band\">Si-OH<\/span><\/button>\n          <button class=\"analyte\" data-a=\"2\"><span class=\"n\">Vinyl content<\/span><span class=\"band\">~1600 cm&#8315;&sup1;<\/span><\/button>\n          <button class=\"analyte\" data-a=\"3\"><span class=\"n\">Residual cyclics D4\/D5\/D6<\/span><span class=\"band\">~490 cm&#8315;&sup1;<\/span><\/button>\n          <button class=\"analyte\" data-a=\"4\"><span class=\"n\">Cure state (LSR\/HCR\/RTV)<\/span><span class=\"band\">~2160 cm&#8315;&sup1;<\/span><\/button>\n          <button class=\"analyte\" data-a=\"5\"><span class=\"n\">Chlorosilane D\/T\/M composition<\/span><span class=\"band\">D\/T\/M<\/span><\/button>\n        <\/div>\n\n        <div class=\"spectrum-panel\">\n          <div class=\"sp-top\">\n            <span class=\"sp-live\"><span class=\"dot\"><\/span>Live &middot; Raman 785 nm<\/span>\n            <span class=\"sp-read\" id=\"gkms-spread\">Reactor R-1 &middot; acquiring<\/span>\n          <\/div>\n          <svg class=\"spec-svg\" viewBox=\"0 0 600 200\" preserveAspectRatio=\"none\">\n            <g class=\"grid\">\n              <line x1=\"0\" y1=\"50\" x2=\"600\" y2=\"50\"\/><line x1=\"0\" y1=\"100\" x2=\"600\" y2=\"100\"\/><line x1=\"0\" y1=\"150\" x2=\"600\" y2=\"150\"\/>\n              <line x1=\"150\" y1=\"0\" x2=\"150\" y2=\"200\"\/><line x1=\"300\" y1=\"0\" x2=\"300\" y2=\"200\"\/><line x1=\"450\" y1=\"0\" x2=\"450\" y2=\"200\"\/>\n            <\/g>\n            <path class=\"trace\" id=\"gkms-trace\" d=\"M0,175 L40,168 L90,110 L140,150 L180,140 L210,120 L260,150 L300,72 L340,150 L390,64 L440,150 L500,118 L560,150 L600,160\"\/>\n            <line class=\"marker\" id=\"gkms-marker\" x1=\"150\" y1=\"0\" x2=\"150\" y2=\"200\"\/>\n            <text class=\"mlabel\" id=\"gkms-mlabel\" x=\"156\" y=\"20\">DP<\/text>\n          <\/svg>\n          <div class=\"spec-axis\">Raman shift (cm&#8315;&sup1;) &rarr;<\/div>\n          <div class=\"spec-detail\">\n            <div class=\"sd-name\" id=\"gkms-sdname\">Siloxane chain length \/ DP<\/div>\n            <div class=\"sd-desc\" id=\"gkms-sddesc\">The molecular-weight property silicone performance rides on, tracked from the spectrum instead of inferred from a viscosity proxy.<\/div>\n          <\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- ===== 03 \u00b7 SILOXANE CHAIN LENGTH \/ DP ===== -->\n  <section id=\"chain\">\n    <div class=\"wrap\">\n      <div class=\"sec-head reveal\">\n        <span class=\"num\">03<\/span>\n        <span class=\"eyebrow\">Parameter 1 of 6<\/span>\n        <h2 class=\"h2\">Siloxane chain length \/ DP - the property performance rides on.<\/h2>\n        <p class=\"lead\">Molecular weight, set by the degree of polymerisation of the siloxane chain, decides the viscosity and the application of a PDMS grade - fluid, gel or rubber base. In most plants it is inferred from a viscosity proxy. Spectrally tracks it from the spectrum itself.<\/p>\n      <\/div>\n      <div class=\"how-grid\">\n        <div class=\"how-points\">\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"6.5\"\/><path d=\"M12 2.5v3M12 18.5v3M2.5 12h3M18.5 12h3\"\/><circle cx=\"12\" cy=\"12\" r=\"1.2\" fill=\"currentColor\" stroke=\"none\"\/><\/svg><\/div><div><h4>Why it decides the batch<\/h4><p>Chain length and DP set the molecular weight, and molecular weight sets viscosity - which sets what the silicone can be used for. It is the master property of a PDMS grade, produced by polycondensation of Si-OH with elimination of water or methanol.<\/p><\/div><\/div>\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"8.5\"\/><path d=\"M12 7.5V12l3 2\"\/><\/svg><\/div><div><h4>How it is read today<\/h4><p>Inline viscometry gives a molecular-weight proxy but no composition. The detail comes offline: GC-FID at 30-60 min, GC\/MS at 60-120 min with extraction. A viscosity number cannot tell linear PDMS from residual cyclics.<\/p><\/div><\/div>\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><path d=\"M3 12h3.5l2.5-6.5 4 13 2.5-6.5H21\"\/><\/svg><\/div><div><h4>What reading it inline changes<\/h4><p>DP is followed from the Raman spectrum during the condensation, continuously, alongside the residual cyclics and the condensation progress - molecular weight read as chemistry rather than inferred from a viscosity proxy after the reaction.<\/p><\/div><\/div>\n        <\/div>\n        <div class=\"tp-photo reveal\"><img decoding=\"async\" src=\"https:\/\/gekkophotonics.com\/wp-content\/uploads\/2026\/07\/probe-flange-front-4.jpg\" alt=\"Spectrally X1 PROBE flange on a silicone process line\"><\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- ===== 04 \u00b7 SILANOL (Si-OH) CONTENT ===== -->\n  <section id=\"silanol\" class=\"ctx\">\n    <div class=\"wrap\">\n      <div class=\"sec-head reveal\">\n        <span class=\"num\">04<\/span>\n        <span class=\"eyebrow\">Parameter 2 of 6<\/span>\n        <h2 class=\"h2\">Silanol (Si-OH) content - condensation control, read live.<\/h2>\n        <p class=\"lead\">PDMS is built by polycondensation of Si-OH groups with elimination of water or methanol. Residual silanol content is the functional-group handle on that reaction - read live instead of after the fact.<\/p>\n      <\/div>\n      <div class=\"how-grid\">\n        <div class=\"tp-photo reveal\"><img decoding=\"async\" src=\"https:\/\/gekkophotonics.com\/wp-content\/uploads\/2026\/07\/inline-silicone-plant.jpg\" alt=\"Silicone (PDMS) production plant with siloxane reactors and fluid tanks\"><\/div>\n        <div class=\"how-points\">\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"6.5\"\/><path d=\"M12 2.5v3M12 18.5v3M2.5 12h3M18.5 12h3\"\/><circle cx=\"12\" cy=\"12\" r=\"1.2\" fill=\"currentColor\" stroke=\"none\"\/><\/svg><\/div><div><h4>Why it decides the batch<\/h4><p>Silanol is what the condensation consumes. Its level tracks how far the reaction has run and sets the reactivity of the finished polymer, whether the product is a fluid, a gel or a silicone-rubber base.<\/p><\/div><\/div>\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"8.5\"\/><path d=\"M12 7.5V12l3 2\"\/><\/svg><\/div><div><h4>How it is read today<\/h4><p>Followed indirectly: inline viscometry sees molecular weight climb, GC-FID and GC\/MS characterise the product offline at 30-120 min, but none reads the silanol group live in the reactor as the condensation runs.<\/p><\/div><\/div>\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><path d=\"M3 12h3.5l2.5-6.5 4 13 2.5-6.5H21\"\/><\/svg><\/div><div><h4>What reading it inline changes<\/h4><p>Silanol is followed continuously from the spectrum as the condensation proceeds, so the endpoint is steered on the functional group itself rather than on elapsed time or an after-the-fact viscosity read.<\/p><\/div><\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- ===== 05 \u00b7 VINYL CONTENT ===== -->\n  <section id=\"vinyl\">\n    <div class=\"wrap\">\n      <div class=\"sec-head reveal\">\n        <span class=\"num\">05<\/span>\n        <span class=\"eyebrow\">Parameter 3 of 6<\/span>\n        <h2 class=\"h2\">Vinyl content - the addition-cure handle, from the C=C band.<\/h2>\n        <p class=\"lead\">In addition-cure LSR and HCR, vinyl groups react with Si-H over a Pt (Karstedt) catalyst with no by-product eliminated. Vinyl content is the handle on that chemistry, read from the vinyl C=C band near 1600 cm&#8315;&sup1;.<\/p>\n      <\/div>\n      <div class=\"how-grid\">\n        <div class=\"how-points\">\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"6.5\"\/><path d=\"M12 2.5v3M12 18.5v3M2.5 12h3M18.5 12h3\"\/><circle cx=\"12\" cy=\"12\" r=\"1.2\" fill=\"currentColor\" stroke=\"none\"\/><\/svg><\/div><div><h4>Why it decides the batch<\/h4><p>Vinyl is one of the two reacting groups in addition cure. Its level sets the crosslink density and the mechanical properties of the cured rubber, from soft LSR gels to high-consistency stock.<\/p><\/div><\/div>\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"8.5\"\/><path d=\"M12 7.5V12l3 2\"\/><\/svg><\/div><div><h4>How it is read today<\/h4><p>FTIR ATR characterises vinyl on finished samples in R&amp;D. There is no live in-reactor read: gel-time is observational and non-numeric, DSC is 30-90 min offline, and the rheometer runs off the line.<\/p><\/div><\/div>\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><path d=\"M3 12h3.5l2.5-6.5 4 13 2.5-6.5H21\"\/><\/svg><\/div><div><h4>What reading it inline changes<\/h4><p>The vinyl C=C band near 1600 cm&#8315;&sup1; is read directly and continuously, so the addition-cure formulation is verified in-process rather than on a finished coupon after the batch is made.<\/p><\/div><\/div>\n        <\/div>\n        <div class=\"tp-photo reveal\"><img decoding=\"async\" src=\"https:\/\/gekkophotonics.com\/wp-content\/uploads\/2026\/07\/inline-silicone-cabinet.jpg\" alt=\"Spectrally X1 INLINE analyzer cabinet on a process line\"><\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- ===== 06 \u00b7 RESIDUAL CYCLICS D4\/D5\/D6 ===== -->\n  <section id=\"cyclics\" class=\"ctx\">\n    <div class=\"wrap\">\n      <div class=\"sec-head reveal\">\n        <span class=\"num\">06<\/span>\n        <span class=\"eyebrow\">Parameter 4 of 6<\/span>\n        <h2 class=\"h2\">Residual cyclics D4\/D5\/D6 - the regulated by-product, read continuously.<\/h2>\n        <p class=\"lead\">Cyclic siloxanes D4, D5 and D6 are the regulated by-product of PDMS chemistry. Spectrally reads them from the siloxane band near 490 cm&#8315;&sup1; - cyclic versus linear - continuously, instead of in a 60-120 minute GC\/MS slot.<\/p>\n      <\/div>\n      <div class=\"how-grid\">\n        <div class=\"how-points\">\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"6.5\"\/><path d=\"M12 2.5v3M12 18.5v3M2.5 12h3M18.5 12h3\"\/><circle cx=\"12\" cy=\"12\" r=\"1.2\" fill=\"currentColor\" stroke=\"none\"\/><\/svg><\/div><div><h4>Why it decides the batch<\/h4><p>EU Regulation (EU) 2024\/1328 caps D4+D5+D6 below 0.1% by weight in consumer products from 06.06.2026 and in leave-on cosmetics from 06.06.2027. The residual cyclics level decides whether a batch clears that hard, dated limit.<\/p><\/div><\/div>\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"8.5\"\/><path d=\"M12 7.5V12l3 2\"\/><\/svg><\/div><div><h4>How it is read today<\/h4><p>GC\/MS at 60-120 minutes per sample plus extraction. NIR does not separate cyclic from linear siloxane, so it cannot stand in for the cyclics number that the regulation is written against.<\/p><\/div><\/div>\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><path d=\"M3 12h3.5l2.5-6.5 4 13 2.5-6.5H21\"\/><\/svg><\/div><div><h4>What reading it inline changes<\/h4><p>The 490 cm&#8315;&sup1; siloxane band distinguishes cyclic from linear directly, so residual cyclics are tracked live against the limit and each batch closes with a continuous, time-stamped record instead of a single post-batch sample.<\/p><\/div><\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- ===== 07 \u00b7 CURE STATE (LSR\/HCR\/RTV) ===== -->\n  <section id=\"cure\">\n    <div class=\"wrap\">\n      <div class=\"sec-head reveal\">\n        <span class=\"num\">07<\/span>\n        <span class=\"eyebrow\">Parameter 5 of 6<\/span>\n        <h2 class=\"h2\">Cure state - crosslinking confirmed in-process.<\/h2>\n        <p class=\"lead\">In LSR, HCR and RTV systems the cure is the crosslinking reaction between Si-H and vinyl. Spectrally confirms it in-process from the vanishing Si-H band near 2160 cm&#8315;&sup1; and the vinyl C=C band near 1600 cm&#8315;&sup1;.<\/p>\n      <\/div>\n      <div class=\"how-grid\">\n        <div class=\"how-points\">\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"6.5\"\/><path d=\"M12 2.5v3M12 18.5v3M2.5 12h3M18.5 12h3\"\/><circle cx=\"12\" cy=\"12\" r=\"1.2\" fill=\"currentColor\" stroke=\"none\"\/><\/svg><\/div><div><h4>Why it decides the batch<\/h4><p>The degree of crosslinking is the finished property of the rubber. For medical-grade LSR and RTV in implants, catheters and valve membranes, it is a documented, repeatable process parameter per batch under EU MDR 2017\/745.<\/p><\/div><\/div>\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"8.5\"\/><path d=\"M12 7.5V12l3 2\"\/><\/svg><\/div><div><h4>How it is read today<\/h4><p>Gel-time (observational, non-numeric), DSC at 30-90 min offline and an offline rotational rheometer - all after the reaction, on samples that describe a batch already made.<\/p><\/div><\/div>\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><path d=\"M3 12h3.5l2.5-6.5 4 13 2.5-6.5H21\"\/><\/svg><\/div><div><h4>What reading it inline changes<\/h4><p>The Si-H band near 2160 cm&#8315;&sup1; falling as the vinyl reacts gives a live crosslinking signal, documented as a continuous process record - and for medical-grade batches, a per-batch record for the CE dossier. Residual Pt catalyst is quantified as an element by ICP: a clean division of labor, with Raman owning the composition and crosslinking side.<\/p><\/div><\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- ===== 08 \u00b7 CHLOROSILANE D\/T\/M COMPOSITION ===== -->\n  <section id=\"chlorosilane\" class=\"ctx\">\n    <div class=\"wrap\">\n      <div class=\"sec-head reveal\">\n        <span class=\"num\">08<\/span>\n        <span class=\"eyebrow\">Parameter 6 of 6<\/span>\n        <h2 class=\"h2\">Chlorosilane D\/T\/M composition - read after the reactor, through sapphire.<\/h2>\n        <p class=\"lead\">The D\/T\/M monomer ratio - Me2SiCl2, MeSiCl3 and Me3SiCl from the Muller-Rochow process - sets the type of the final silicone. Spectrally reads the chlorosilane stream inline after the reactor through a sapphire (Al2O3) window that stands up to the corrosive HCl by-product.<\/p>\n      <\/div>\n      <div class=\"how-grid\">\n        <div class=\"how-points\">\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"6.5\"\/><path d=\"M12 2.5v3M12 18.5v3M2.5 12h3M18.5 12h3\"\/><circle cx=\"12\" cy=\"12\" r=\"1.2\" fill=\"currentColor\" stroke=\"none\"\/><\/svg><\/div><div><h4>Why it decides the batch<\/h4><p>The D\/T\/M ratio determines whether the downstream product is a linear fluid, a resin or an endcap. It sets the silicone's architecture from the monomer up, and it carries into every REACH composition record for the substances placed on the market.<\/p><\/div><\/div>\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"8.5\"\/><path d=\"M12 7.5V12l3 2\"\/><\/svg><\/div><div><h4>How it is read today<\/h4><p>GC at 20-40 minutes, with HCl protection required at the sampling point. NIR has limited selectivity with HCl present, so it struggles to resolve the monomer split cleanly.<\/p><\/div><\/div>\n          <div class=\"how-point reveal\"><div class=\"hi\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.8\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><path d=\"M3 12h3.5l2.5-6.5 4 13 2.5-6.5H21\"\/><\/svg><\/div><div><h4>What reading it inline changes<\/h4><p>The chlorosilane composition is read inline immediately after the Muller-Rochow reactor, through a sapphire window rated for the corrosive stream, so the monomer split is controlled in the process instead of confirmed by a protected lab sample.<\/p><\/div><\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n  <!-- ===== 09 \u00b7 WHAT COMES OFF YOUR CRITICAL PATH ===== -->\n  <section id=\"displaced\">\n    <div class=\"wrap\">\n      <div class=\"sec-head reveal\">\n        <span class=\"num\">09<\/span>\n        <span class=\"eyebrow\">The offline methods, displaced<\/span>\n        <h2 class=\"h2\">What comes off your critical path.<\/h2>\n        <p class=\"lead\">None of these methods disappears. They move from real-time gatekeeper to periodic verification - GC\/MS and DSC stay the reference methods - and the batch decision stops waiting for them.<\/p>\n      <\/div>\n      <div class=\"repl\">\n        <div class=\"item reveal\"><span class=\"lag\">60-120 min<\/span><div><div class=\"m\">GC\/MS - residual cyclics D4\/D5\/D6<\/div><div class=\"s\">Plus extraction. Tracked live from the 490 cm&#8315;&sup1; band; becomes a periodic reference.<\/div><\/div><\/div>\n        <div class=\"item reveal\"><span class=\"lag\">30-60 min<\/span><div><div class=\"m\">GC-FID - PDMS characterisation<\/div><div class=\"s\">Composition and chain length followed from the spectrum during the batch.<\/div><\/div><\/div>\n        <div class=\"item reveal\"><span class=\"lag\">30-90 min<\/span><div><div class=\"m\">DSC - cure state<\/div><div class=\"s\">Crosslinking confirmed in-process from the vanishing Si-H band.<\/div><\/div><\/div>\n        <div class=\"item reveal\"><span class=\"lag\">observational<\/span><div><div class=\"m\">Gel-time<\/div><div class=\"s\">Non-numeric and after the fact. Replaced by a live crosslinking signal.<\/div><\/div><\/div>\n        <div class=\"item reveal\"><span class=\"lag\">offline<\/span><div><div class=\"m\">Rotational rheometer<\/div><div class=\"s\">Cure characterised on the line instead of on a coupon off it.<\/div><\/div><\/div>\n        <div class=\"item reveal\"><span class=\"lag\">20-40 min<\/span><div><div class=\"m\">GC - chlorosilane composition<\/div><div class=\"s\">With HCl protection at sampling. Read inline after the reactor through a sapphire window.<\/div><\/div><\/div>\n        <div class=\"item reveal\"><span class=\"lag\">MW proxy<\/span><div><div class=\"m\">Inline viscometry<\/div><div class=\"s\">A molecular-weight proxy without composition. DP read as chemistry from the spectrum.<\/div><\/div><\/div>\n        <div class=\"item reveal\"><span class=\"lag\">ambiguous<\/span><div><div class=\"m\">NIR<\/div><div class=\"s\">Cannot separate cyclic from linear, limited with HCl present. Raman resolves both.<\/div><\/div><\/div>\n        <div class=\"item reveal\"><span class=\"lag\">R&amp;D only<\/span><div><div class=\"m\">FTIR ATR - vinyl on finished samples<\/div><div class=\"s\">Vinyl read live from the C=C band near 1600 cm&#8315;&sup1; during the cure.<\/div><\/div><\/div>\n      <\/div>\n    <\/div>\n  <\/section>\n\n<div class=\"pager\">\n    <span><a href=\"\/specialty-silicones\/chemistry\/\">&larr; Chemistry<\/a><\/span>\n    <span><a href=\"\/specialty-silicones\/how-it-works\/\">How it works &rarr;<\/a><\/span>\n  <\/div>\n<section id=\"contact\">\n    <div class=\"wrap\">\n      <div class=\"cta reveal\">\n        <span class=\"eyebrow no-line\" style=\"color:#fff;justify-content:center\">Your next step<\/span>\n        <h2 class=\"h2\">See these parameters read on your own silicone.<\/h2>\n        <p>Send representative samples or process data from your PDMS, LSR\/HCR, chlorosilane or medical-grade silicone stream. We build and validate a chemometric model on your silicone matrix and deliver the parameters inline Raman reads on your line - the spectra, the band assignments, the model metrics against your reference method (GC\/MS, DSC) and a clear result.<\/p>\n        <form class=\"gkms-form\" data-region=\"m5-specialty-silicones\" data-region-label=\"Microsite M5 - Industrial and specialty silicones\" data-source=\"microsite-m5-what-we-measure\" novalidate>\n          <div class=\"gkms-form-q\">What would you like to do?<\/div>\n          <div class=\"gkms-choices\" role=\"radiogroup\" aria-label=\"What would you like to do?\">\n            <button type=\"button\" class=\"gkms-opt is-sel\" data-val=\"feasibility\" role=\"radio\" aria-checked=\"true\">Feasibility study<\/button>\n            <button type=\"button\" class=\"gkms-opt\" data-val=\"workshop\" role=\"radio\" aria-checked=\"false\">Workshop seat<\/button>\n            <button type=\"button\" class=\"gkms-opt\" data-val=\"info\" role=\"radio\" aria-checked=\"false\">Send info<\/button>\n          <\/div>\n          <p class=\"gkms-hint\" id=\"gkms-hint\"><\/p>\n          <div class=\"gkms-row\">\n            <input type=\"email\" class=\"gkms-email\" name=\"email\" required placeholder=\"you@company.com\" autocomplete=\"email\" aria-label=\"Your work email\">\n            <button type=\"submit\" class=\"btn btn-light gkms-submit\">Send request<\/button>\n          <\/div>\n          <input type=\"text\" class=\"gkms-hp\" name=\"company_hp\" tabindex=\"-1\" autocomplete=\"off\" aria-hidden=\"true\">\n          <label class=\"gkms-consent\"><input type=\"checkbox\" class=\"gkms-consent-cb\" name=\"consent\" required><span>By submitting this form, I confirm I have read and understood the <a href=\"https:\/\/gekkophotonics.com\/en\/privacy-policy\/\" target=\"_blank\" rel=\"noopener\">privacy policy<\/a> <span class=\"gkms-req\">*<\/span><\/span><\/label>\n          <p class=\"gkms-msg\" aria-live=\"polite\"><\/p>\n        <\/form>\n        <p class=\"cta-alt\"><a href=\"https:\/\/gekkophotonics.com\/products\/spectrally-inline\/\">Explore Spectrally X1 INLINE -&gt;<\/a><\/p>\n      <\/div>\n    <\/div>\n  <\/section>\n<footer class=\"foot\">\n    <div class=\"wrap\">\n      <div class=\"foot-grid\">\n        <div>\n          <img decoding=\"async\" class=\"flogo\" src=\"https:\/\/gekkophotonics.com\/wp-content\/uploads\/2026\/07\/logo-full-4.png\" alt=\"Gekko Photonics\">\n          <p class=\"ftag\">Engineering-Driven Analytics. 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