● Txuag cov nqi ntawm cov khoom kom qhuav (raws li qhov loj ntawm cov khoom siv thiab cov khoom siv raw khoom sib txawv).
● Txhim kho lub sijhawm khau raj ntawm cov neeg ua haujlwm.
● Txo lub sij hawm ncua ntawm cov khoom kom qhuav.
● Khoom xim kom zoo sib xws.
● Txo cov khoom sib khi kab.
● Txo qhov muaj feem ntawm cov khoom siv hluav taws kub.
● Txhim kho qhov fluidity ntawm cov ntaub ntawv yas.
● Txuag tus nqi ntawm kev yuav khoom auxiliary tshuab (cov khoom siv ziab).
● Txo kev ntshai ntawm cov neeg ua haujlwm ntawm cov cuab yeej ziab khaub ncaws.
● Tiv thaiv cov yas nyob rau hauv cov khoom kom qhuav thaum lub caking thiab discoloration.