I.Kumenyekanisha ibicuruzwa:
Igicuruzwa kigizwe nicyitegererezo cyibanze hamwe nubunini icumi butandukanye bwerekana isahani yo hagati, bikwiranye na (0.1 ~ 0.58) mm z'ubugari bwa sample, byose hamwe 10, hamwe nibisahani bitandukanye, birashobora guhuza n'ubunini bw'icyitegererezo. Byakoreshejwe cyane mubikorwa byo gukora impapuro, gupakira no kugenzura ubuziranenge bwibicuruzwa ninganda nishami. Nigikoresho kidasanzwe cyo kugerageza impeta yo kwikuramo impeta namakarito.
u No.1 0.100-0.140 mm
u No.2 0.141-0.170 mm
u No.3 0.171-0.200 mm
u No.4 0.201-0.230 mm
u No.5 0.231-0.280 mm
u No.6 0.281-0.320 mm
u No.7 0.321-0.370 mm
u No.8 0.371-0.420 mm
u No.9 0.421-0.500 mm
u No.10 0.501-0.580 mm