4.Quality Standard
(1)Hair Flaws :
W ≦ 0.05mm , L ≦ 12 mm ok
0.05mm <
W ≦ 0.10mm , L ≦ 5 mm 3 or less for OK
W ≦ 0.10mm , L ≦ 2mm NO good
(W: Width OF flaws, L: length of laws)
(2)Dot – shaped Impurities :
D ≦ 0.10mm OK
0.1mm <
D ≦ 0.3mm 5 or less for OK
D > 0.3mm No good
(D : average of diameter)
(3)Scratch:
W ≦ 0.05mm , L ≦ 12 mm ok
0.05mm <
W ≦ 0.10mm , L ≦ 12 mm 5 or less for OK
W ≦ 0.10mm , L > 2mm NO good
(W: Width of Scratch, L: length of scratch)
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