Umzi-mveliso othe ngqo ngombala wesanti edaywe ngesanti ecolekileyo yendalo kunye nesanti ye-silica enemibala yokupeyinta
Isanti enemibala yohlulwe ibe yintlabathi enemibala yendalo, isanti enemibala emdaka kunye nesanti edayiwe.Iimpawu zayo zezi: imibala eqaqambileyo, ukuxhathisa kwe-asidi kunye ne-alkali, ukuxhathisa kwe-UV, kwaye akukho kuphelelwa.
Uhlobo: isanti yombala wendalo, isanti enemibala.
ubukhulu: 10-20.20-40.40-80.80-120.120-180.200mesh.
Bhala umyalezo wakho apha kwaye uwuthumele kuthi
