Kev sib tsoo yog txhawm rau zom cov iav ntxhib thiab tsis sib npaug ntawm cov khoom lag luam cawv lossis cov khoom seem ntawm lub khob thaum nws tsim, kom cov khoom muaj lub tiaj tus lossis cov duab thiab qhov loj me. Feem ntau, siv coarse abrasives nrog kev sib tsoo siab ua haujlwm rau kev sib tsoo, tom qab ntawd siv cov abrasives zoo ib kauj ruam mus txog rau thaum lub iav saum npoo zoo dua, thiab tom qab ntawd txhuam nrog cov ntaub ntawv polishing kom cov iav nto du, pob tshab thiab ci iab.
Lub hardness ntawm abrasive yuav tsum ntau dua li cov iav. Cov iav kho qhov muag thiab cov khoom siv niaj hnub feem ntau muaj cov nyiaj ua haujlwm loj, thiab siv corundum lossis ntuj emery ua abrasives; iav tiaj tus muaj ib qho me me machining nyiaj pub dawb, tab sis thaj chaw loj thiab siv ntau, feem ntau siv cov xuab zeb pheej yig quartz. Feem ntau siv iav lub raj mis polishing cov ntaub ntawv yog cov hmoov liab (hlau oxide), cerium oxide, chromium oxide, zirconium oxide, thiab lwm yam. Hluav taws kub polishing yog siv lub burner nrog tsawg radiant tshav kub, kom cov nto ntawm cov khoom yog melted tsis deformation thiab smoothed. los ntawm nto nro, thiaj li mus tshem tawm micro-cracks, folds thiab ripples ntawm qhov chaw ntawm cov khoom.
Tshuaj polishing yog siv hydrofluoric acid los rhuav tshem thawj daim ntaub silicon oxide ntawm lub iav nto kom tsim tau ib txheej tshiab ntawm silicon oxide daim ntaub, kom lub iav muaj qib siab ntawm kev ua tiav thiab lub teeb xa mus. Cov tshuaj yaig tuaj yeem siv rau polishing ib leeg, lossis tshuaj lom neeg tuaj yeem ua ke nrog kev sib tsoo tshuab. Lub tom kawg tseem hu ua tshuaj sib tsoo, uas feem ntau yog siv rau cov iav ca.