I.Chiyambi cha Zamalonda:
Chogulitsachi chili ndi maziko a chitsanzo ndi mafotokozedwe khumi osiyanasiyana a mbale yapakati, oyenera makulidwe a chitsanzo (0.1 ~ 0.58 mm, mafotokozedwe 10 onse, okhala ndi ma plates osiyanasiyana apakati, amatha kusintha malinga ndi makulidwe osiyanasiyana a chitsanzo. Amagwiritsidwa ntchito kwambiri popanga mapepala, kulongedza ndi kuyang'anira khalidwe la malonda ndi madipatimenti. Ndi chida chapadera choyesera mphamvu ya kukanikiza mphete ya pepala ndi makatoni.
u Nambala 1 0.100-0.140 mm
u Nambala 2 0.141-0.170 mm
u Nambala 3 0.171-0.200 mm
u Nambala 4 0.201-0.230 mm
u Nambala 5 0.231-0.280 mm
u Nambala 6 0.281-0.320 mm
u Nambala 7 0.321-0.370 mm
u Nambala 8 0.371-0.420 mm
u Nambala 9 0.421-0.500 mm
u No.10 0.501-0.580 mm