Fores yuav tsum yeej ib txwm muaj porous, softness thiab uniformity. Tom qab ib lub sij hawm, nws yuav lo rau lub qhov hws los thaiv cov pores tom qab ib lub sij hawm.
1. Ntxuav pawg phosphates ntawm av nplaum thiab pigments.
2. Dissolt aluminium syndrome nrog hydrochloric acid, sulfuric acid, thiab lwm yam.
3. 1000L dej kub ntxiv rau 2KG non-ion nto active cov kuab tshuaj thiab 4kg triv phosphoric acid naste 100kg hnov ntawm 40-50 degrees thiab tau ntxuav 10-20min txhua zaus.
4. Formula rau cov kuab tshuaj.