Brightness, thiab tuaj yeem ua rau opacities lossis ntau yam xim iav pob tshab, pom lub teeb xa mus txog li 90%, tuaj yeem soj ntsuam cov ntsiab lus kom pom tseeb, nrog cov txiaj ntsig zoo nkauj.
Yog hais tias lub khob iav tuaj yeem pom cov xim ntawm cov cawv txiv hmab thiab cov npuas dej tawm, cov iav tais diav, cov khoom siv ua noj tuaj yeem soj ntsuam cov kev hloov ntawm cov khoom noj cua sov thiab cua txias. Qhov Performance index ntawm refraction (na) ntawm cov iav siv lead ua tuaj yeem ncav cuag 1.56, glossiness yog qhov zoo, muaj lub suab meej thiab nkig xim hlau thaum tawm tsam, rov qab los muab lub suab qab zib uas resonates tom qab tawm tsam, qhov no yog lwm yam khoom siv cawv, dej teeb qhov chaw. tsis muaj.
Raws li qhov yuav tsum tau ua kom zoo nkauj, tuaj yeem ua rau opacities, ib nrab opacities, Venus lossis ntau hom xim iav, yuav luag txhua xim tuaj yeem npaj. Cov iav tuaj yeem ua raws li cov hniav nyiaj hniav kub xws li pearls, jade muaj nuj nqis, ivory, coral thiab amber, thiab ua cov qauv thiab xim ntawm cov khoom muaj nqis tsawg uas tsis muaj nyob hauv qhov xwm txheej.
Post lub sij hawm: Jan-10-2020