2, tuaj yeem tshwm sim los ntawm cov xim sib xyaw, yog tias siv cov khoom sib xyaw zoo, ces cov xim ntawm cov pob zeb loj heev.
3, tej zaum nws yuav tshwm sim los ntawm ntau yam pigments, piv txwv li, nyob rau hauv kev tsim kho txheej txheem ntxiv siab alkaline pigments rau cov pob zeb, ces yuav muaj qhov tshwm sim ntawm pob zeb sib txawv xim.
4, kuj tseem tuaj yeem ua rau cov khoom siv ntxiv thiab cov xim tsis sib xws, thiab tsis muaj kev tswj hwm ntau npaum li cas, uas tseem yuav ua rau cov xim sib txawv ntawm cov pob zeb.
5, tej zaum yuav muaj dej thiab dej-cement piv teeb meem tshwm sim los ntawm, tsis ua raws li qhov kev faib ua feem ntawm kev faib, ua rau cov pob zeb sib txawv xim.
