Colorfastness rau fabrics feem ntau raug soj ntsuam siv 1-5 rating system, nrog 5 sawv cev rau qhov zoo tshaj plaws colorfastness thiab 1 sawv cev qhov phem tshaj. Qhov kev ntsuam xyuas no tau siv dav hauv ntau qhov kev ntsuam xyuas, suav nrog kev ntxuav, txhuam, hws, pom lub teeb, thiab ntxuav kom qhuav, txhawm rau ntsuas cov xim ruaj khov ntawm cov ntaub thaum siv. Cov ntaub uas muaj kev ntsuam xyuas siab tsis tshua muaj tshwm sim los yog zas xim tsiv teb tsaws chaw nyob rau hauv kev ntxhua khaub ncaws, rub, los yog lub teeb raug mob, thaum cov ntaub uas tsis tshua muaj qhov yuav muaj kev cuam tshuam loj heev los yog xim hloov. Hauv cov kev ntsuam xyuas tshwj xeeb, cov khoom sib txawv xim muaj lawv tus kheej cov kev ntsuas kev ywj pheej. Ntxuav colourfastness, ntub thiab qhuav colourfastness, thiab perspiration colorfastness feem ntau nyob ntawm 1 txog 5; Piv txwv li, qhov kev ntsuam xyuas xim ntawm 5 qhia tias yuav luag tsis muaj xim hloov pauv hauv ntub thiab qhuav, thaum qhov ntsuas ntawm 3 qhia me ntsis hloov. Lub teeb colorfastness yog ntsuas raws li qib ntawm cov xim hloov ntawm cov ntaub nyob rau hauv lub teeb ci los yog tshav ntuj raug; qhov ntsuas ntawm 5 qhia tau hais tias tsis muaj kev hloov xim, thaum qhov ntsuas ntawm 1 qhia qhov tseem ceeb fading lossis discoloration.
Cov kev ntsuas colourfastness sib txawv nyob ntawm seb qhov xav tau ntawm cov ntaub. High-cov khaub ncaws kawg, cov khoom siv sab nraum zoov, lossis cov khaub ncaws me me feem ntau yuav tsum muaj xim nrawm ntawm 4-5 txhawm rau ua kom ruaj khov thiab nyab xeeb; Cov khaub ncaws niaj hnub zoo tib yam tuaj yeem lees txais qhov ntsuas ntawm 3-4. Los ntawm kev sib faib cov xim colourfastness, cov tuam txhab thiab cov neeg siv khoom tuaj yeem nkag siab txog qhov ua tau zoo thiab qib zoo ntawm cov ntaub, yog li xaiv cov khoom tsim nyog rau lawv txoj kev npaj siv.