subject: Quality standards by the Ministry of Light Industry Division raised the national standard leather be [print this page] Quality standards by the Ministry of Light Industry Division raised the national standard leather be
4.4.3 stitch clear and straight, elastic consistency, thin dense uniform, not seriously skewed. Seamless appearance pin position, float, double eye of a needle, not more than one pin jumpers.
5, test methods 5.1 with perception-based, combined Measuring Tools Conduct.
5.2 Dividing the value of the thickness of 0.1mm with a thickness of the table to measure the leather.
5.3 width of 0.5mm with the division value of the steel ruler to measure.
5.4 length of 1mm with a division value of the tape measure.
5.5 trial crack surface around the leather for the outside diameter of 30mm cylindrical bending 160 degrees to see if a cracked leather surface.
5.6 Decolorization test of fine white cloth to dry the surface of the leather rubbed one of five positions along the direction to see if bleaching.
6, inspection rules 6.1 mass-produced leather belt factory inspection, random sampling of 5%, testing 4.1,4.2,4.4.1,4.4.2, article. Article 4.3,4.4.3 piece by piece on the test, and set levels.
