The metal zipper "standard, the chromatic aberration of the zipper and color (color sample) is how the provisions of, the same batch of cloth color is how the provisions of, before and after batch cloth color difference is how the provisions of Color difference to GB/T250 - 2008 assessment of color change with gray - like card as the evaluation criteria.

 

For metal zipper, the new standard will be color share more detailed, there are three concepts: material and color cards color, such as cloth and color (color sample), chain teeth and color (color sample), pull head and color (color sample) contrast color; the second is compared to the same batch of material of color difference, color difference compared before and after the batch material. Aberration of cloth and color (color sample) requirements slightly adjusted by the original should be consistent with the GB/T250 - 2008 3 adjustment to comply with grade 3 - grade 4, the same batch of cloth color with four provisions, before and after the batch cloth color conforms to the provisions of 3 - 4 level.

 

In the metal zipper "standard, the chromatic aberration of the chain teeth and color (color sample) is how the provisions of, the same batch of chain teeth color difference is how to set Before and after the batch of chain tooth color is how to set Aberration of chain teeth and color (color sample) requirements shall be in accordance with the GB/T250 - 2008 level 3, level 4 Provisions, the same batch of chain teeth color should comply with the four provisions, before and after the number of chain teeth color should conform to the regulation on Level 3, level 4.

 

In the new standard, the code is not allowed to install zipper 100 meters above 2 joints, the old standard is not more than 3 joints.