Icupa ry'umucanga rigurishwa mu ibara ry'umucanga rikoresha irangi ry'amabuye menshi, rikoresha irangi ry'umucanga ... rifite ubutaka bw'ubusitani bufite amabara atandukanye.
Umucanga w'amabara ugabanyijemo umucanga w'amabara karemano, umucanga w'amabara avanze, n'umucanga w'amabara avanze. Ibiranga ni ibi: amabara meza, aside na alkali, ubudahangarwa n'imirasire y'izuba, kandi nta gucika intege.
Ubwoko: umusenyi w'ibara ry'umwimerere, umusenyi w'ibara.
Ingano: 10-20.20-40.40-80.80-120.120-180.200mesh.
Andika ubutumwa bwawe hano hanyuma ubwoherereze














