{"id":8845,"date":"2025-09-08T10:04:24","date_gmt":"2025-09-08T10:04:24","guid":{"rendered":"https:\/\/changhongchemical.com\/?p=8845"},"modified":"2026-04-27T11:16:01","modified_gmt":"2026-04-27T11:16:01","slug":"guidelines-for-selecting-photoinitiators-in-uv-coating-formulations","status":"publish","type":"post","link":"https:\/\/changhongchemical.com\/fr\/guidelines-for-selecting-photoinitiators-in-uv-coating-formulations\/","title":{"rendered":"Lignes directrices pour la s\u00e9lection des photo-initiateurs dans les formulations de vernis UV"},"content":{"rendered":"<h1><strong>Lignes directrices pour la s\u00e9lection des photo-initiateurs dans les formulations de vernis UV<\/strong><\/h1>\n<p><strong><b>Aper\u00e7u des photo-initiateurs<\/b><\/strong><\/p>\n<p>- Dans les produits photopolym\u00e9risables, les photo-initiateurs jouent un r\u00f4le essentiel. Il s'agit de substances capables d'absorber l'\u00e9nergie rayonnante et de subir des r\u00e9actions chimiques pour g\u00e9n\u00e9rer des interm\u00e9diaires r\u00e9actifs (radicaux libres ou cations) capables d'initier la polym\u00e9risation.<\/p>\n<p>- Dans la pratique, les photo-initiateurs radicaux qui g\u00e9n\u00e8rent des radicaux libres sont principalement utilis\u00e9s, tandis que les photo-initiateurs cationiques produisant des cations sont extr\u00eamement rares. Cet article se concentre sur les photo-initiateurs radicaux.<\/p>\n<p><strong><b>Classification des photo-initiateurs<\/b><\/strong><\/p>\n<ul>\n<li>Les photo-initiateurs radicaux sont principalement class\u00e9s en deux cat\u00e9gories en fonction de leur m\u00e9canisme de g\u00e9n\u00e9ration de radicaux actifs : les photo-initiateurs radicaux de type clivage (\u00e9galement appel\u00e9s photo-initiateurs de type I) et les photo-initiateurs radicaux \u00e0 lib\u00e9ration d'hydrog\u00e8ne (\u00e9galement appel\u00e9s photo-initiateurs de type II).<\/li>\n<li>Common cleaving-type photoinitiators are structurally predominantly arylalkyl ketone compounds. Commonly available grades include: 184, 2959, 651, 907, 369, <a href=\"https:\/\/changhongchemical.com\/product\/irgacure-1173-cas-7473-98-5\/\">1173<\/a>, 819, TPO, MBF, 754, etc.<\/li>\n<li>Les photo-initiateurs courants qui \u00e9liminent l'hydrog\u00e8ne sont structurellement d\u00e9riv\u00e9s de benzoph\u00e9nones ou de c\u00e9tones h\u00e9t\u00e9rocycliques. Les qualit\u00e9s couramment disponibles sont les suivantes : BP, ITX, 2-EA. En outre, les photo-initiateurs \u00e0 lib\u00e9ration d'hydrog\u00e8ne ont besoin de co-initiateurs pour \u00eatre activ\u00e9s. Actuellement, les principaux co-initiateurs utilis\u00e9s sont des amines r\u00e9actives et des esters benzo\u00efques de type amine tertiaire.<\/li>\n<\/ul>\n<p><strong><b>S\u00e9lection des photo-initiateurs<\/b><\/strong><\/p>\n<p>L'efficacit\u00e9 des photo-initiateurs dans le d\u00e9clenchement des r\u00e9actions de polym\u00e9risation au sein des produits photopolym\u00e9risables et, en fin de compte, dans l'obtention des performances souhait\u00e9es, d\u00e9pend de l'interaction harmonieuse entre le syst\u00e8me de photo-initiation, les conditions d'irradiation et les composants du produit. Il est donc particuli\u00e8rement important de s\u00e9lectionner les photo-initiateurs appropri\u00e9s en fonction des processus de production et des formulations de produits sp\u00e9cifiques.<\/p>\n<p>Les sections suivantes d\u00e9taillent les m\u00e9thodes de s\u00e9lection des photo-initiateurs en examinant leurs propri\u00e9t\u00e9s et en les illustrant par des \u00e9tudes de cas sp\u00e9cifiques.<\/p>\n<p><strong><b>Le spectre d'absorption du photo-initiateur doit correspondre au spectre d'\u00e9mission de la source lumineuse.<\/b><\/strong><\/p>\n<p>Les sources lumineuses les plus courantes sur le march\u00e9 sont les lampes \u00e0 mercure, les lampes LED, les lampes \u00e0 induction et les lampes \u00e0 halog\u00e9nures m\u00e9talliques. Parmi celles-ci, les lampes \u00e0 mercure sont les plus utilis\u00e9es, \u00e9mettant un spectre compris entre 200 et 450 nm et constituant une option polyvalente. Les lampes LED sont largement utilis\u00e9es dans les applications de s\u00e9chage \u00e0 faible consommation d'\u00e9nergie, avec des longueurs d'onde d'\u00e9mission concentr\u00e9es autour de 365\/375\/385\/395\/405 nm.<\/p>\n<p>Lors de la s\u00e9lection d'un photo-initiateur, choisissez-en un qui pr\u00e9sente des caract\u00e9ristiques d'absorption significatives dans la bande de longueur d'onde correspondante du spectre d'\u00e9mission de la source lumineuse.<\/p>\n<p><strong><b>\u00c9tude de cas : <\/b><\/strong><\/p>\n<p>Dans les formules de vernis en gel, le choix du photo-initiateur est fortement contraint par la source lumineuse. Les lampes \u00e0 ongles courantes utilisent deux types de tubes : les tubes fluorescents et les tubes LED. Les tubes fluorescents \u00e9mettent entre 370 et 420 nm, tandis que les tubes LED \u00e9mettent entre 365 et 395 nm. Les deux \u00e9mettent dans la r\u00e9gion des ondes longues, ce qui n\u00e9cessite des initiateurs qui absorbent des longueurs d'onde plus importantes.<\/p>\n<p>Le tableau 1 pr\u00e9sente les pics d'absorption de divers photo-initiateurs courants. Pour obtenir une initiation optimale, il convient de choisir des photo-initiateurs dont les pics d'absorption sont sup\u00e9rieurs \u00e0 365 nm, tels que le TPO et le 819. Bien que le 784 ait une longueur d'onde de pic d'absorption plus longue, son co\u00fbt \u00e9lev\u00e9 limite son adoption par le march\u00e9.<\/p>\n<p>Dans les essais pratiques, le TPO et le 819 ont d\u00e9montr\u00e9 les meilleures performances parmi tous les photo-initiateurs, ce qui correspond aux r\u00e9sultats pr\u00e9vus.<\/p>\n<p><strong><b><img decoding=\"async\" class=\"alignnone size-full wp-image-8847\" src=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/1-1.webp\" alt=\"\" width=\"1920\" height=\"1325\" srcset=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/1-1.webp 1920w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/1-1-768x530.webp 768w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/1-1-1536x1060.webp 1536w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/1-1-18x12.webp 18w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/1-1-1043x720.webp 1043w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/1-1-600x414.webp 600w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/>S\u00e9lection de photo-initiateurs pour le durcissement en profondeur des syst\u00e8mes color\u00e9s<\/b><\/strong><\/p>\n<ul>\n<li>Dans les syst\u00e8mes color\u00e9s, en particulier les syst\u00e8mes fonc\u00e9s, les pigments eux-m\u00eames absorbent une partie de l'\u00e9nergie UV, emp\u00eachant la lumi\u00e8re UV de p\u00e9n\u00e9trer dans le film de peinture. Cela emp\u00eache les photo-initiateurs des couches profondes d'absorber suffisamment d'\u00e9nergie pour amorcer la polym\u00e9risation, ce qui se traduit en fin de compte par un durcissement insuffisant en profondeur. Dans les cas l\u00e9gers, l'adh\u00e9rence peut \u00eatre r\u00e9duite, tandis que dans les cas graves, la surface peut se plisser, ce qui compromet \u00e0 la fois l'aspect du film de peinture et ses propri\u00e9t\u00e9s physiques et chimiques.<\/li>\n<li>Dans le spectre UV, les grandes longueurs d'onde pr\u00e9sentent des capacit\u00e9s de p\u00e9n\u00e9tration sup\u00e9rieures, ce qui leur permet d'atteindre plus efficacement les couches profondes du film de rev\u00eatement. Inversement, les longueurs d'onde plus courtes peinent \u00e0 p\u00e9n\u00e9trer \u00e0 ces profondeurs. Par cons\u00e9quent, sans photo-initiateurs \u00e0 ondes longues pour absorber l'\u00e9nergie de ces longueurs d'onde plus importantes dans les couches plus profondes, l'initiation de la polym\u00e9risation devient difficile. C'est pourquoi les photo-initiateurs \u00e0 p\u00e9n\u00e9tration profonde sont indispensables dans les syst\u00e8mes pigment\u00e9s. En se r\u00e9f\u00e9rant au tableau 1, la combinaison de photo-initiateurs \u00e0 ondes longues comme le TPO\/819\/651 avec des photo-initiateurs \u00e0 ondes courtes comme le 184\/1173 donne des r\u00e9sultats favorables.<\/li>\n<\/ul>\n<p><strong><b>\u00c9tude de cas :<\/b><\/strong><\/p>\n<p>Dans les syst\u00e8mes de couleurs UV \u00e0 couche unique, les formulations noires pr\u00e9sentent souvent une faible adh\u00e9rence et un \u00e9chec de l'adh\u00e9rence des hachures. L'ajout de 1,5% 819 \u00e0 la formulation a consid\u00e9rablement am\u00e9lior\u00e9 l'adh\u00e9rence du film, d\u00e9montrant le r\u00f4le du 819 dans la promotion d'un durcissement en profondeur.<\/p>\n<p>En outre, dans les syst\u00e8mes noir et blanc, les combinaisons 907\/ITX + 184 et 369\/ITX + 184 ont donn\u00e9 des r\u00e9sultats remarquables.<\/p>\n<p><strong><b>S\u00e9lection de photo-initiateurs pour les syst\u00e8mes pr\u00e9sentant des exigences en mati\u00e8re de jaunissement<\/b><\/strong><\/p>\n<p>Dans certains vernis et syst\u00e8mes blancs, la r\u00e9sistance au jaunissement est un indicateur critique pour \u00e9valuer la performance du film de rev\u00eatement. Outre la s\u00e9lection de r\u00e9sines et de monom\u00e8res pr\u00e9sentant une excellente r\u00e9sistance au jaunissement, la tendance au jaunissement des photo-initiateurs doit \u00e9galement \u00eatre minimis\u00e9e. Les initiateurs de photopolym\u00e9risation contenant des substituants tels que le N-dim\u00e9thylamino dans leurs structures conjugu\u00e9es pr\u00e9sentent g\u00e9n\u00e9ralement des tendances au jaunissement induites par l'irradiation plus \u00e9lev\u00e9es. De m\u00eame, la pr\u00e9sence de tels substituants dans les structures amines r\u00e9actives exacerbe \u00e9galement le jaunissement.<\/p>\n<p>Le tableau 2 pr\u00e9sente les indices de jaunissement de divers initiateurs de photopolym\u00e9risation, en utilisant le triacrylate d'oxyde de propyle et de penta\u00e9rythritol comme mat\u00e9riau de base et sans aucun initiateur comme r\u00e9f\u00e9rence vierge.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-8848\" src=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/2-1.webp\" alt=\"\" width=\"1920\" height=\"1729\" srcset=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/2-1.webp 1920w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/2-1-768x692.webp 768w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/2-1-1536x1383.webp 1536w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/2-1-13x12.webp 13w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/2-1-800x720.webp 800w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/2-1-600x540.webp 600w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><br \/>\nComme le montre le tableau ci-dessus, 184, 1173, 754 et MBF sont tous des photo-initiateurs pr\u00e9sentant un jaunissement minimal, ce qui en fait le choix optimal pour les formulations de vernis et de syst\u00e8mes blancs.<\/p>\n<p><strong><b>Bonne solubilit\u00e9 dans les diluants actifs et les oligom\u00e8res<\/b><\/strong><\/p>\n<p>Une excellente solubilit\u00e9 est une condition pr\u00e9alable essentielle \u00e0 l'incorporation des photo-initiateurs dans les syst\u00e8mes ; une compatibilit\u00e9 sup\u00e9rieure garantit une plus grande stabilit\u00e9 de la formulation.<\/p>\n<p>Le tableau suivant indique la solubilit\u00e9 de certains photo-initiateurs dans des solvants et des monom\u00e8res courants.<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-8846\" src=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/3.webp\" alt=\"\" width=\"1920\" height=\"1018\" srcset=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/3.webp 1920w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/3-768x407.webp 768w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/3-1536x814.webp 1536w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/3-18x10.webp 18w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/3-1280x679.webp 1280w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/3-600x318.webp 600w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><br \/>\nCes derni\u00e8res ann\u00e9es, les vernis \u00e0 base d'eau sont devenus de plus en plus courants, et les vernis UV \u00e0 base d'eau ont \u00e9galement fait l'objet d'une attention particuli\u00e8re. Actuellement, les produits \u00e0 haute solubilit\u00e9 dans l'eau sont peu nombreux sur le march\u00e9. Les options disponibles dans le commerce sont les suivantes : KIPEM, 819DW, BTC, BPQ, QTX, etc. Le 2959 atteint une solubilit\u00e9 dans l'eau de 1,7% et peut \u00e9galement \u00eatre utilis\u00e9 dans les produits UV \u00e0 base d'eau.<\/p>\n<p><strong><b>Autres propri\u00e9t\u00e9s<\/b><\/strong><\/p>\n<p>Lors de la s\u00e9lection des photo-initiateurs, privil\u00e9gier ceux qui ont une faible odeur, une faible toxicit\u00e9, une bonne stabilit\u00e9 thermique et une volatilit\u00e9 ou une migration minimale. S'assurer que les composants du photo-initiateur s\u00e9lectionn\u00e9s sont conformes aux lois et r\u00e9glementations locales.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Conclusion<\/strong><\/p>\n<p><strong><b>En r\u00e9sum\u00e9, la s\u00e9lection des photo-initiateurs n'est pas une t\u00e2che isol\u00e9e, mais doit \u00eatre coordonn\u00e9e avec l'ensemble du syst\u00e8me et m\u00eame avec le processus d'application. Pour choisir un photo-initiateur \u00e0 la fois \u00e9conomique et tr\u00e8s efficace, il faut tenir compte de la source lumineuse, des autres composants du syst\u00e8me et des exigences de performance du produit photopolym\u00e9ris\u00e9.<\/b><\/strong><\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Overview of Photoinitiators &#8211; In light-curing products, photoinitiators serve as a critical component. They are substances capable of absorbing radiant energy and undergoing chemical reactions to generate reactive intermediates (free radicals or cations) with&#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8845","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Guidelines for Selecting Photoinitiators in UV Coating Formulations<\/title>\n<meta name=\"description\" content=\"The effectiveness of photoinitiators in triggering polymerization reactions within light-curable products, ultimately achieving the desired performance, depends on the harmonious coordination between the photoinitiation system, irradiation conditions, and product components. Therefore, selecting appropriate photoinitiators based on specific production processes and product formulations is particularly crucial.The following sections will detail photoinitiator screening methods by combining their properties with specific case studies.Matching the absorption spectrum of photoinitiators with the emission spectrum of light sourcesCommon light sources on the market include mercury lamps, LED lamps, induction lamps, and metal halide lamps. Among these, mercury lamps are the most widely used, emitting a spectrum ranging from 200-450nm and serving as a universal type. LED lamps find extensive application in low-energy curing projects, with emission wavelengths concentrated at 365\/375\/385\/395\/405nm.When selecting a photoinitiator, choose one with significant absorption in the light source&#039;s emission spectrum.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/changhongchemical.com\/fr\/guidelines-for-selecting-photoinitiators-in-uv-coating-formulations\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Guidelines for Selecting Photoinitiators in UV Coating Formulations\" \/>\n<meta property=\"og:description\" content=\"The effectiveness of photoinitiators in triggering polymerization reactions within light-curable products, ultimately achieving the desired performance, depends on the harmonious coordination between the photoinitiation system, irradiation conditions, and product components. Therefore, selecting appropriate photoinitiators based on specific production processes and product formulations is particularly crucial.The following sections will detail photoinitiator screening methods by combining their properties with specific case studies.Matching the absorption spectrum of photoinitiators with the emission spectrum of light sourcesCommon light sources on the market include mercury lamps, LED lamps, induction lamps, and metal halide lamps. Among these, mercury lamps are the most widely used, emitting a spectrum ranging from 200-450nm and serving as a universal type. LED lamps find extensive application in low-energy curing projects, with emission wavelengths concentrated at 365\/375\/385\/395\/405nm.When selecting a photoinitiator, choose one with significant absorption in the light source&#039;s emission spectrum.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/changhongchemical.com\/fr\/guidelines-for-selecting-photoinitiators-in-uv-coating-formulations\/\" \/>\n<meta property=\"og:site_name\" content=\"Changhong Chemical\" \/>\n<meta property=\"article:published_time\" content=\"2025-09-08T10:04:24+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-27T11:16:01+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2025\/09\/1-1.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1325\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Changhong Chemical\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Changhong Chemical\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/changhongchemical.com\\\/guidelines-for-selecting-photoinitiators-in-uv-coating-formulations\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/changhongchemical.com\\\/guidelines-for-selecting-photoinitiators-in-uv-coating-formulations\\\/\"},\"author\":{\"name\":\"Changhong Chemical\",\"@id\":\"https:\\\/\\\/changhongchemical.com\\\/#\\\/schema\\\/person\\\/2a9593ff69d6db8f8ca0567ca3ed6b5d\"},\"headline\":\"Guidelines for Selecting Photoinitiators in UV Coating Formulations\",\"datePublished\":\"2025-09-08T10:04:24+00:00\",\"dateModified\":\"2026-04-27T11:16:01+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/changhongchemical.com\\\/guidelines-for-selecting-photoinitiators-in-uv-coating-formulations\\\/\"},\"wordCount\":937,\"publisher\":{\"@id\":\"https:\\\/\\\/changhongchemical.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/changhongchemical.com\\\/guidelines-for-selecting-photoinitiators-in-uv-coating-formulations\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/changhongchemical.com\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/1-1.webp\",\"articleSection\":[\"Uncategorized\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/changhongchemical.com\\\/guidelines-for-selecting-photoinitiators-in-uv-coating-formulations\\\/\",\"url\":\"https:\\\/\\\/changhongchemical.com\\\/guidelines-for-selecting-photoinitiators-in-uv-coating-formulations\\\/\",\"name\":\"Guidelines for Selecting Photoinitiators in UV Coating Formulations\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/changhongchemical.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/changhongchemical.com\\\/guidelines-for-selecting-photoinitiators-in-uv-coating-formulations\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/changhongchemical.com\\\/guidelines-for-selecting-photoinitiators-in-uv-coating-formulations\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/changhongchemical.com\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/1-1.webp\",\"datePublished\":\"2025-09-08T10:04:24+00:00\",\"dateModified\":\"2026-04-27T11:16:01+00:00\",\"description\":\"The effectiveness of photoinitiators in triggering polymerization reactions within light-curable products, ultimately achieving the desired performance, depends on the harmonious coordination between the photoinitiation system, irradiation conditions, and product components. Therefore, selecting appropriate photoinitiators based on specific production processes and product formulations is particularly crucial.The following sections will detail photoinitiator screening methods by combining their properties with specific case studies.Matching the absorption spectrum of photoinitiators with the emission spectrum of light sourcesCommon light sources on the market include mercury lamps, LED lamps, induction lamps, and metal halide lamps. Among these, mercury lamps are the most widely used, emitting a spectrum ranging from 200-450nm and serving as a universal type. 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