Ibyerekeye iki kintu
- Gutunganya Vulcanisation bituma ubuso bwa gants bugenda neza, ntabwo byoroshye gufatana hamwe
- Igishushanyo cyamaboko kidasanzwe kugirango utezimbere ihumure, Igishushanyo cyihariye cyimikindo kugirango wirinde kunyerera neza, gufata neza, umufasha mwiza wo gusukura igikoni
- Acide na alkali ibidukikije bifite inzitizi nziza, kurinda amaboko imiti