{"id":5892,"date":"2024-11-25T01:42:52","date_gmt":"2024-11-25T00:42:52","guid":{"rendered":"https:\/\/www.proof.de\/?post_type=encyclopedia&#038;p=5892"},"modified":"2024-11-25T01:42:52","modified_gmt":"2024-11-25T00:42:52","slug":"lysemidler","status":"publish","type":"encyclopedia","link":"https:\/\/www.proof.de\/da\/lexikon\/aufheller\/","title":{"rendered":"Opkl\u00e6bende middel"},"content":{"rendered":"<div class=\"kk-star-ratings kksr-auto kksr-align-right kksr-valign-top\" data-payload='{\"align\":\"right\",\"id\":\"5892\",\"slug\":\"default\",\"valign\":\"top\",\"ignore\":\"\",\"reference\":\"auto\",\"class\":\"\",\"count\":\"0\",\"legendonly\":\"\",\"readonly\":\"\",\"score\":\"0\",\"starsonly\":\"\",\"best\":\"5\",\"gap\":\"5\",\"greet\":\"Jetzt bewerten\",\"legend\":\"0\\\/5 - (0 votes)\",\"size\":\"24\",\"title\":\"Aufheller\",\"width\":\"0\",\"_legend\":\"{score}\\\/{best} - ({count} {votes})\",\"font_factor\":\"1.25\"}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 0px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            <span class=\"kksr-muted\">Bed\u00f8m nu<\/span>\n    <\/div>\n    <\/div>\n<p>Brightener (ogs\u00e5 <a href=\"https:\/\/www.proof.de\/da\/lexikon\/optische-aufheller\/\" target=\"_self\" title=\"Optiske blegemidler er tils\u00e6tningsstoffer, som papirproducenter bruger til at f\u00e5 papiret til at se hvidere og lysere ud.\" class=\"encyclopedia\">optiske blegemidler<\/a> eller <a href=\"https:\/\/www.proof.de\/da\/lexikon\/oba\/\" target=\"_self\" title='OBA er en forkortelse for &quot;Optical Brightning Agents&quot; eller &quot;Optical Brightners&quot;.' class=\"encyclopedia\">OBA<\/a>s - Optical Brightning Agents - er kemiske forbindelser, der bruges i trykkeribranchen til at forbedre papirets lysstyrke og hvidhed. De absorberer UV-lys og udsender det som synligt bl\u00e5t lys, hvilket giver papiret en \u201elysere\u201c og \u201efriskere\u201c hvid tone. Denne effekt \u00f8ger de trykte produkters glans og f\u00e5r papiret til at se hvidere og mere v\u00e6rdifuldt ud.<\/p>\n<p>Optiske blegemidler bruges i papirproduktionen, men blegemidler bruges ogs\u00e5 i trykfarver for at \u00f8ge kontrasten og farveintensiteten, is\u00e6r i foto- og farvetryk. Brugen af dem er s\u00e6rlig vigtig i produktionen af h\u00f8jkvalitetspapir og emballage, hvor et str\u00e5lende udseende er afg\u00f8rende.<\/p>\n<p>De mest anvendte blegemidler i papirindustrien er stilbenblegemidler, som er s\u00e6rligt effektive til at g\u00f8re papiret lysere. De er baseret p\u00e5 stilbenens grundstruktur. Andre typer er benzoxazol- og triazol-blankemidler, som bruges til s\u00e6rlige form\u00e5l. Benzoxazol-blankemidler bruges ofte til s\u00e6rlige form\u00e5l, f.eks. til fremstilling af gennemsigtigt papir eller i tekstilindustrien. De er ogs\u00e5 effektive, men brugen af dem er mindre almindelig sammenlignet med stilbenforbindelser. Triazolblankere bruges hovedsageligt til produktion af specialpapir. Hvert blegemiddel har specifikke egenskaber, der g\u00f8r det velegnet til forskellige papirer og anvendelser.<\/p>\n<p>En ulempe ved blegemidler er, at deres effekt kan aftage med tiden. Desuden kan h\u00f8je koncentrationer forstyrre trykprocessen og f\u00f8re til u\u00f8nskede refleksioner eller farve\u00e6ndringer. Ikke desto mindre bruges blegemidler ogs\u00e5 af milj\u00f8m\u00e6ssige \u00e5rsager: De sparer kemisk blegning til lyse hvide papirer, som er endnu mere skadeligt for milj\u00f8et end blegemidlerne. Og virksomhederne arbejder hele tiden p\u00e5 at udvikle mere b\u00e6redygtige, biologisk nedbrydelige blegemidler.<\/p>","protected":false},"excerpt":{"rendered":"<p>Lysemidler (ogs\u00e5 kendt som optiske lysemidler eller OBA'er) er kemiske forbindelser, der bruges i trykkeribranchen til at forbedre papirets lysstyrke og hvidhed. De absorberer UV-lys og udsender det som synligt bl\u00e5t lys, hvilket giver papiret en \u201elysere\u201c og \u201efriskere\u201c hvid tone. Denne effekt \u00f8ger de trykte produkters glans og f\u00e5r papiret til at se hvidere og mere v\u00e6rdifuldt ud. Optiske blegemidler bruges i papirproduktionen, men blegemidler bruges ogs\u00e5 i trykfarver for at \u00f8ge kontrasten og farveintensiteten, is\u00e6r i fotografisk tryk. <\/p>\n<p class=\"read-more-container\"><a title=\"Opkl\u00e6bende middel\" class=\"read-more button\" href=\"https:\/\/www.proof.de\/da\/lexikon\/aufheller\/#more-5892\" aria-label=\"L\u00e6s mere om lysnende midler\">L\u00e6s mere her<\/a><\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","template":"","meta":{"inline_featured_image":false,"footnotes":""},"class_list":["post-5892","encyclopedia","type-encyclopedia","status-publish","hentry","no-featured-image-padding"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.9 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Matthias Betz\"\/>\n\t<meta name=\"google-site-verification\" content=\"TuXxyRwxcEg2-WfOaQ8vScWQh3-uBAnxXmY7g3GT90A\" 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