Yuav ua li cas ntxuav lub plooj (porcelain crucible)?

Koj tuaj yeem sim nws nrog chromic acid lotion. Chromic acid lotion ntxuav txoj kev: chromic acid lotion (100g poov tshuaj dichromate yaj nyob rau hauv 200ml concentrated sulfuric acid), xyuam xim rau kev nyab xeeb thaum npaj, saib xyuas, thiab nco ntsoov nco ntsoov.