Pigment vs Dye
Pigments thiab dyes yog cov khoom siv los xim lwm yam khoom. Ob leeg pigments thiab dyes tau siv txij li lub sij hawm immemorial rau cov khaub ncaws xim thiab lwm yam khoom siv los ntawm tib neeg. Pigment yog cov xim xim feem ntau nyob rau hauv daim ntawv ntawm cov hmoov insoluble uas ua rau xim thaum ntxiv rau dej thiab roj. Ib qho zas xim kuj yog cov khoom siv xim txawm tias nws yog soluble hauv dej thiab ua kom muaj kev sib xyaw uas tuaj yeem siv los xim ntau yam khoom xws li khaub ncaws, pob tawb thiab lwm yam khoom siv. Txawm li cas los xij, nws nyuaj rau kev sib txawv ntawm ob qho tib si rau ntau tus neeg. Kab lus no yuav qhia txog lawv cov khoom kom ua rau qhov sib txawv meej rau cov neeg nyeem.
Pigment
Ib xim yog xim xim uas ua rau cov xim ntawm cov khoom sib txawv vim nws nqus tau qee qhov wavelengths. Muaj ntau yam khoom uas muaj cov cuab yeej no ntawm kev xaiv wavelength absorption tab sis tsuas yog ob peb tus neeg raug xaiv los ua haujlwm ua cov xim. Pigments uas tsim cov txiaj ntsig ntev ntev yog xav tau. Muaj qee qhov uas tsim cov xim hloov ib ntus thiab cov xim no hu ua fugitives. Fugitives ploj mus nrog lub sijhawm. Pigments feem ntau yog siv rau xim zaub mov, tshuaj pleev ib ce, yas, xim thiab inks.
Dye
Dyes yog cov khoom muaj nyob hauv ib txwm muaj thiab ua hluavtaws ib yam nkaus, thiab muaj peev xwm hloov cov xim ntawm cov khoom uas lawv siv. Tib neeg tau paub txog dyes txij thaum ub los. Thaum ntxov, feem ntau ntawm cov dyes tau los ntawm cov nroj tsuag. Cov hauv paus hniav, ntoo, qia, tawv ntoo, thiab nplooj ntawm cov nroj tsuag tau siv los muab cov xim uas siv rau ntawm cov khaub ncaws thiab lwm yam khoom, los hloov lawv cov xim. Indigo thiab saffron yog cov xim muaj npe nrov siv los ntawm tib neeg txij li thaum ub. Synthetic dyes tau tsim thawj zaug nyob rau hauv lub xyoo pua 19th thiab txij thaum ntawd los; Ntau txhiab tus hluavtaws dyes tau tsim.
Dab tsi yog qhov txawv ntawm Pigment thiab Dye?
• Pigment is insoluble, whereas dye is soluble in water.
• Muaj ntau txhiab dyes nrog rau ntuj thiab hluavtaws dyes, whereas pigments yog comparatively me me nyob rau hauv tooj.
• Cov molecules ntawm dyes loj heev nyob rau hauv kev sib piv rau cov molecules ntawm pigments uas yog me me heev.
• Dyes yog cov xim uas ua haujlwm ntawm lub hauv paus ntsiab lus ntawm kev xaiv wavelength absorption thaum pigments ua haujlwm ntawm lub hauv paus ntsiab lus ntawm lub teeb tawg thiab xaiv kev nqus ntawm wavelength.
• Dyes yog organic nyob rau hauv qhov chaw thaum pigments yog inorganic tshuaj (qee yam ntawm no yog heev toxic).
• Thaum siv rau hauv cov ntawv luam ntawv, dye raws li inks muaj ntau yam loj thaum cov xim raws li cov xim muaj ntau yam kev xaiv.
• Dyes raws li inks muaj lub neej luv dua thaum cov xim raws li cov xim muaj lub neej ntev dua thiab muaj zog dua.
