Cov phuam qhwv ntsej muag pov tseg yog lwm txoj hauv kev rau cov phuam da dej; lawv cov txiaj ntsig tseem ceeb yog kev nyiam huv, yooj yim, thiab tiv thaiv kab mob loj hlob, ua rau lawv zoo tagnrho rau kev ntxuav lub ntsej muag txhua hnub, tshem tawm pleev, thiab mus ncig. Thaum yuav khoom, cov ntsiab lus tseem ceeb uas yuav tsum xav txog suav nrog seb cov khoom puas yog 100% paj rwb, tsis muaj cov tshuaj fluorescent, thiab cov phuam qhwv lub thickness thiab absorbency.
Cov phuam qhwv ntsej muag muaj ntau yam kev siv. Lawv ua lub hom phiaj tshwj xeeb hauv ntau qhov chaw-los ntawm kev tu tsev txhua hnub thiab siv nqa tau yooj yim thaum mus ncig lossis mus ncig ua lag luam mus rau kev saib xyuas kev nyiam huv hauv cov chaw pej xeem xws li tsev kho kom zoo nkauj thiab gyms. Tshwj xeeb tshaj yog thaum muaj kev sib kis, cov phuam so pov tseg no tau dhau los ua cov cuab yeej tseem ceeb rau kev tswj tus kheej kev nyiam huv thiab tiv thaiv kev sib kis -.
