cov khoom

piav qhia luv luv:

Tus neeg sawv cev ashing yog ib hom khoom siv tseem ceeb uas siv rau hauv cov txheej txheem ashing tam sim ntawd tom qab cov txheej txheem immersion hauv dej. Lub hom phiaj tseem ceeb ntawm cov txheej txheem no yog tshem tawm cov plaub hau, saponify cov rog sab hauv ntawm daim tawv nqaij, thiab ntxiv loosen cov collagen fibers, tso lub hauv paus rau cov txheej txheem tanning tom ntej. Lub luag haujlwm tseem ceeb ntawm tus neeg sawv cev ashing yog los txhim kho kev ua haujlwm thiab zoo ntawm cov txheej txheem no, thaum txo qis kev siv thiab kev ua qias tuaj ntawm cov tshuaj tseem ceeb xws li sodium sulfide.