Isanti enemibala ethe ngqo yefektri edayiweyo, isanti yesilika yendalo kunye nombala, isanti yesilika yokupeyinta
Intlabathi enemibala yahlulwe yaba yintlabathi enemibala yendalo, intlabathi enemibala exutyiweyo, kunye nentlabathi enemibala edayiweyo. Iimpawu zayo zezi: imibala eqaqambileyo, ukumelana ne-asidi kunye ne-alkali, ukumelana ne-UV, kunye nokungafi.
Uhlobo: isanti yombala wendalo, isanti enemibala.
ubungakanani: 10-20.20-40.40-80.80-120.120-180.200mesh.
Bhala umyalezo wakho apha uze uwuthumele kuthi
