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Direct Black 19 kua, los yog lwm lub npe PERGASOL BLACK G, nws yog ib tug hluavtaws zas xim uas belongs rau cov dub carboard dye.Nws yog tsim los ntawm cov hmoov G dub ncaj qha.Nws yog feem ntau siv nyob rau hauv kev lag luam textile rau dye fabrics, tshwj xeeb tshaj yog paj rwb, ntaub plaub, thiab txhob lo lo ntxhuav.Cov kua dej dub rau cov duab los qhia dub yog xim dub sib sib zog nqus nrog cov xim muaj zog ceev ceev.

Cov kua dej dub rau cov duab los qhia dub, kua dej ncaj qha dub 19, ntawm no yog ib qho yooj yim daim ntawv dyeing txoj kev: Sib sau cov ntaub ntawv: Koj yuav xav tau ntawv (xws li dawb los yog lub teeb-xim cardstock los yog watercolor ntawv), kua dye los yog dej raws li tus number case, a yas thawv los yog tais, dej, thiab ib daim txhuam cev txhuam los yog eyedropper.Teeb tsa koj thaj chaw ua haujlwm: Npog koj qhov chaw ua haujlwm nrog cov ntawv xov xwm yas lossis cov ntawv xov xwm qub kom tsis txhob muaj qhov nchuav los yog stains.Npaj cov tshuaj zas xim: Ua raws li cov lus qhia ntawm cov kua dye lossis number case los npaj cov ntawv dye tov.Feem ntau, koj yuav dilute cov xim rau qhov xav tau concentration hauv dej.Yog tias siv cov kua dej ua kua, nws tuaj yeem diluted nrog dej.Daim ntawv ntub dej: saturate daim ntawv los ntawm dipping nws mus rau hauv ib lub thawv dej.