1.JOIN SEAM ALLOWANCE IS 8 MM.±1 MM.
2.STITCH LENGTH IS 5 - 6 STITCHES PER 25 MM.
3.NO EXPOSED THREAD ENDS
4.NO SKIPPED STITCHES
5.SEW REQUIRES BACK TRACK, MIN 4 STITCHES ,MAX 6 STITCHES
6.DECK SEAM WIDTH 5 MM. ±1 MM.
7.DOUBLE STITCH WIDTH 8 MM.
8.HEMS IS 5 MM. ±1 MM.
9.PIN STITCH FOR J-RETAINER NUMBER 140 BALL TYPE
10.PIN STITCH SEWING NUMBER 120 BALL TYPE
11.NOTCH ALIGNMENT TOLERANCE IS 0-3 MM. TO CENTER OF NOTCH
12.TOLERANCE CONTROL BOUNDARY OF PATTERN ± 1.5 mm.
13.SEWING RIM IS 3 - 4 MM
14.QUALITY FOR LEATHER PATTERN:
A = WITHOUT MISTAKE
B=SMALL MISTAKE
C=REDUCED MISTAKE