{"id":1130,"date":"2014-11-10T23:48:43","date_gmt":"2014-11-10T22:48:43","guid":{"rendered":"http:\/\/www.proof.de\/?post_type=encyclopedia&p=1130"},"modified":"2022-03-15T12:04:21","modified_gmt":"2022-03-15T11:04:21","slug":"oba","status":"publish","type":"encyclopedia","link":"https:\/\/proof.proofen.de\/cs\/lexikon\/oba\/","title":{"rendered":"OBA"},"content":{"rendered":"
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\n 2.6\/5 - (5 votes) <\/div>\n <\/div>\n

OBA je zkratka pro \"Optical Brightning Agents\" nebo \"Optical Brightners\", tj. pro \"optick\u00e9 rozjas\u0148ova\u010de\". Optick\u00e9 zjas\u0148ova\u010de<\/a>.<\/p>\n

Optische Rozjas\u0148ova\u010d<\/a> sind Zusatzstoffe, die von Papierherstellern verwendet werden, um ein Papier weißer und leuchtender aussehen zu lassen.<\/p>\n

Aby pap\u00edr vypadal b\u011blej\u0161\u00ed, je d\u016fle\u017eit\u00e9 p\u0159idat do pap\u00edru l\u00e1tky, kter\u00e9 posunou neviditeln\u00e9 ultrafialov\u00e9 spektrum<\/a> mezi 320 a 400 nanometry do viditeln\u00e9ho rozsahu nad 400 nanometr\u016f. V d\u016fsledku toho pap\u00edr zmodr\u00e1 nebo fluoreskuje v oblastech, kter\u00e9 jsou lidsk\u00fdm okem pr\u00e1v\u011b viditeln\u00e9. Zat\u00edmco na\u0161e o\u010di to vn\u00edmaj\u00ed jako jasn\u011bj\u0161\u00ed, namodralou b\u00edlou, colourimeter<\/a> vid\u00ed pouze jinou modrou barvu. m\u011b\u0159en\u00ed barvy<\/a> je proto m\u00edrn\u011b zkresleno optick\u00fdmi zjas\u0148ova\u010di, nap\u0159. vytvo\u0159en\u00e9 profily mohou b\u00fdt na\u017eloutl\u00e9, proto\u017ee se m\u011b\u0159\u00edc\u00ed za\u0159\u00edzen\u00ed sna\u017e\u00ed korigovat namodral\u00fd n\u00e1dech pap\u00edru.<\/p>\n

Mnoho \"b\u00edl\u00fdch\" pap\u00edr\u016f obsahuje optick\u00e9 zjas\u0148ova\u010de. V n\u011bkter\u00fdch p\u0159\u00edpadech se rozjas\u0148uj\u00edc\u00ed \u00fa\u010dinek oslab\u00ed b\u011bhem relativn\u011b kr\u00e1tk\u00e9 doby n\u011bkolika let, tak\u017ee moudrost pap\u00edru se vytr\u00e1c\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"

OBA je zkratka pro \"Optical Brightning Agents\" nebo \"Optical Brightners\".<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","template":"","meta":{"inline_featured_image":false,"footnotes":""},"class_list":["post-1130","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\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\n\t\t\n\t\t\n\t\t\n\t\t