1. Imiterere itandukanye, amabara akungahaye, imiterere yoroshye, irashobora gucibwa kubuntu, gukoreshwa cyane mubisenge by'imisozi ifite imiterere ya geometrike igoye.
2. Amashanyarazi, umuriro, umuriro, aside na alkali irwanya, gusaza.
3. Umucyo woroshye, ugabanya umuvuduko wikoreza umutwaro hejuru yinzu, kandi wongera imiterere ihamye.
4. Ubwikorezi bworoshye / kubika / kubaka, byoroshye gukora.