{"id":5892,"date":"2024-11-25T01:42:52","date_gmt":"2024-11-25T00:42:52","guid":{"rendered":"https:\/\/www.proof.de\/?post_type=encyclopedia&p=5892"},"modified":"2024-11-25T01:42:52","modified_gmt":"2024-11-25T00:42:52","slug":"rozjasnovace","status":"publish","type":"encyclopedia","link":"https:\/\/www.proof.de\/cs\/lexikon\/aufheller\/","title":{"rendered":"Rozjas\u0148ova\u010d"},"content":{"rendered":"
\n \n
\n \n
\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n <\/div>\n \n
\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n
\n \n\n
<\/div>\n <\/div>\n <\/div>\n<\/div>\n \n\n
\n Hodnotit nyn\u00ed<\/span>\n <\/div>\n <\/div>\n

Rozjas\u0148ova\u010d (tak\u00e9 optick\u00e9 zjas\u0148ova\u010de<\/a> nebo OBA<\/a>s \u2013 Optical Brightning Agents \u2013 tzv. optick\u00e9 zjas\u0148ova\u010de) jsou chemick\u00e9 slou\u010deniny, kter\u00e9 se pou\u017e\u00edvaj\u00ed v polygrafick\u00e9m pr\u016fmyslu ke zv\u00fd\u0161en\u00ed jasu a b\u011blosti pap\u00edru. Absorbuj\u00ed UV z\u00e1\u0159en\u00ed a vyza\u0159uj\u00ed ho jako viditeln\u00e9 modr\u00e9 sv\u011btlo, \u010d\u00edm\u017e pap\u00edr z\u00edsk\u00e1v\u00e1 \u201ejasn\u011bj\u0161\u00ed\u201c a \u201esv\u011b\u017eej\u0161\u00ed\u201c odst\u00edn b\u00edl\u00e9. Tento efekt zvy\u0161uje brilantnost tiskovin, pap\u00edry vypadaj\u00ed b\u011blej\u0161\u00ed a kvalitn\u011bj\u0161\u00ed.<\/p>\n

Optick\u00e9 zjas\u0148ova\u010de se pou\u017e\u00edvaj\u00ed p\u0159i v\u00fdrob\u011b pap\u00edru, ale tak\u00e9 v tiskov\u00fdch barv\u00e1ch, kde zvy\u0161uj\u00ed kontrast a intenzitu barev, zejm\u00e9na u fotografick\u00fdch a barevn\u00fdch tisk\u016f. Jejich pou\u017eit\u00ed je obzvl\u00e1\u0161t\u011b d\u016fle\u017eit\u00e9 p\u0159i v\u00fdrob\u011b vysoce kvalitn\u00edho tiskov\u00e9ho pap\u00edru a obal\u016f, u nich\u017e z\u00e1le\u017e\u00ed na brilantn\u00edm vzhledu.<\/p>\n

Nej\u010dast\u011bji pou\u017e\u00edvan\u00fdmi zjas\u0148ova\u010di v pap\u00edrensk\u00e9m pr\u016fmyslu jsou stilbenov\u00e9 zjas\u0148ova\u010de, kter\u00e9 zvl\u00e1\u0161t\u011b \u00fa\u010dinn\u011b zjas\u0148uj\u00ed pap\u00edr. Jsou zalo\u017eeny na z\u00e1kladn\u00ed struktu\u0159e stilbenu. Dal\u0161\u00edmi typy jsou benzoxazolov\u00e9 a triazolov\u00e9 zjas\u0148ova\u010de, kter\u00e9 se pou\u017e\u00edvaj\u00ed pro speci\u00e1ln\u00ed aplikace. Benzoxazolov\u00e9 zjas\u0148ova\u010de se \u010dasto pou\u017e\u00edvaj\u00ed ve speci\u00e1ln\u00edch aplikac\u00edch, jako je v\u00fdroba pr\u016fhledn\u00e9ho pap\u00edru nebo v textiln\u00edm pr\u016fmyslu. Jsou tak\u00e9 \u00fa\u010dinn\u00e9, ale jejich pou\u017eit\u00ed je ve srovn\u00e1n\u00ed se stilbenov\u00fdmi slou\u010deninami m\u00e9n\u011b roz\u0161\u00ed\u0159en\u00e9. Triazolov\u00e9 zjas\u0148ova\u010de se pou\u017e\u00edvaj\u00ed p\u0159edev\u0161\u00edm p\u0159i v\u00fdrob\u011b speci\u00e1ln\u00edch pap\u00edr\u016f. Ka\u017ed\u00fd zjas\u0148ova\u010d m\u00e1 specifick\u00e9 vlastnosti, d\u00edky nim\u017e je vhodn\u00fd pro r\u016fzn\u00e9 druhy pap\u00edru a aplikace.<\/p>\n

Nev\u00fdhodou zjas\u0148ova\u010d\u016f je, \u017ee jejich \u00fa\u010dinek m\u016f\u017ee \u010dasem sl\u00e1bnout. Krom\u011b toho mohou ve vysok\u00fdch koncentrac\u00edch naru\u0161ovat tiskov\u00fd proces a v\u00e9st k ne\u017e\u00e1douc\u00edm odlesk\u016fm nebo zm\u011bn\u00e1m barvy. Zesv\u011btlova\u010de se v\u0161ak pou\u017e\u00edvaj\u00ed tak\u00e9 z ekologick\u00fdch d\u016fvod\u016f: u b\u011blostn\u00e9ho pap\u00edru \u0161et\u0159\u00ed chemick\u00e9 b\u011blidlo, kter\u00e9 je je\u0161t\u011b \u0161kodliv\u011bj\u0161\u00ed pro \u017eivotn\u00ed prost\u0159ed\u00ed ne\u017e zesv\u011btlova\u010de. A spole\u010dnosti neust\u00e1le pracuj\u00ed na v\u00fdvoji udr\u017eiteln\u011bj\u0161\u00edch, biologicky rozlo\u017eiteln\u00fdch zesv\u011btlova\u010d\u016f.<\/p>","protected":false},"excerpt":{"rendered":"

Zjas\u0148ova\u010de (zn\u00e1m\u00e9 tak\u00e9 jako optick\u00e9 zjas\u0148ova\u010de nebo OBA) jsou chemick\u00e9 slou\u010deniny pou\u017e\u00edvan\u00e9 v polygrafick\u00e9m pr\u016fmyslu ke zlep\u0161en\u00ed jasu a b\u011blosti pap\u00edru. Absorbuj\u00ed UV z\u00e1\u0159en\u00ed a vyza\u0159uj\u00ed ho jako viditeln\u00e9 modr\u00e9 sv\u011btlo, \u010d\u00edm\u017e dod\u00e1vaj\u00ed pap\u00edru \u201ejasn\u011bj\u0161\u00ed\u201c a \u201esv\u011b\u017eej\u0161\u00ed\u201c b\u00edl\u00fd odst\u00edn. Tento efekt zvy\u0161uje lesk ti\u0161t\u011bn\u00fdch v\u00fdrobk\u016f, tak\u017ee pap\u00edr vypad\u00e1 b\u011blej\u0161\u00ed a hodnotn\u011bj\u0161\u00ed. Optick\u00e9 zjas\u0148ova\u010de se pou\u017e\u00edvaj\u00ed p\u0159i v\u00fdrob\u011b pap\u00edru, ale zjas\u0148ova\u010de se pou\u017e\u00edvaj\u00ed tak\u00e9 v tiska\u0159sk\u00fdch barv\u00e1ch ke zv\u00fd\u0161en\u00ed kontrastu a intenzity barev, zejm\u00e9na p\u0159i fotografick\u00e9m tisku. <\/p>\n

P\u0159e\u010dt\u011bte si v\u00edce<\/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\n\t\n\t\n\t\n\t\n\t\n\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t