Light Strip Express Envelope 20*60/20*45/20*55 Black with Extra Lining Express Envelope SF Express Package Bag

SF quality Express envelope is actually a bag of the same quality as SF Express envelope, made of new materials, no odor, thick bag and firm. This kind of bag in everyone's impression is pure white, but it is not necessarily. The new materials are transparent. For example, many food-grade plastic bags are made of new materials.

     Express envelope adds a certain proportion of master batch on the basis of new materials, while master batch has different colors. Adding different master batch bags will present different colors. Therefore, our SF quality bags are made of black masterbatch and new materials. The price of the new material is as transparent as that of gold, and the price of each product is almost the same. The difference is that the price of the White Masterbatch is much higher than that of the Black Masterbatch. Therefore, it is a very economical choice to choose Black Masterbatch + new material at this time, except for different colors, the quality is the same. The new black material of the same specification is about one yuan cheaper than a roll of white bag.