Umxube weSand onemibala yendalo oxutywe neSand enemibala yokwakha
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









