Kaolin ibarwa yatangiriye muri Amerika, ubanza gukuraho agaciro kama karubone muri kaolin yoroshye no kunoza umweru wibicuruzwa.Nyuma, abantu bakoresheje ubu buryo mugutunganya amakara apima kaolin, kandi batanga ibicuruzwa bifite imikorere, urwego rwo hejuru, nagaciro karenze kure ordin ...
Soma byinshi