I.Isingeniso somkhiqizo:
Umkhiqizo uqukethe isizinda sesampula kanye nokucaciswa kobukhulu obuyishumi kwepuleti enkabeni, elilungele (0.1 ~ 0.58) mm ubukhulu besampula, inani eliphelele le-10, linamapuleti ahlukene ezikhungweni, lingazivumelanisa nobukhulu besampula ehlukile. Kusetshenziswe kabanzi ekuphathweni kwamaphepha, ukupakisha kanye nokuqashwa kwekhwalithi yomkhiqizo kanye nezimboni zokuhlola kanye neminyango. Kuyithuluzi elikhethekile lokuhlola amandla okucindezela kwendandatho yephepha nekhadibhodi.
u cha.1 0,100-0.140 mm
u Cha.2 0.141-0.170 mm
u Cha.3 0.171-0.200 mm
u Cha.4 0.201-0.230 mm
u Cha.5 0.231-0.280 mm
u No.6 0.281-0.320 mm
u Cha.7 0.321-0.370 mm
u No.8 0.371-0.420 MM
u Cha.9 0.421-0.500 mm
u No.10 0.501-0.580 mm