1.Ọ nwere ike iji ya mepụta nnu dị iche iche, na-adọba ụgbọala, ihe nchebe mmiri, fillings filler, fiber indiccant, ihe mgbaze maka usoro ogologo nke igwe.
A na-ejikarị ya mee ihe na Dye, mkpuchi na mmepụta ndị ọzọ.
3.Ọ bụkwa onye na-edegharị maka mkpebi chromium na molyBemum trioxide na nyocha kemịkal.
