The photographic bag nylon 900D and nylon 1680PU are respectively

Many people think that the "D" in backpack material stands for density or weight. This is all wrong. D is? Short for Daniel. Denier is the unit of measurement for fibers. The calculation method is: the linear weight per 9000m 1 g is called denier. Therefore, the smaller the number before D, the thinner the line and the smaller the density. For example, the material of 2 10D, with fine grain, is generally used as the lining or interlayer of bags. However, the lines and threads of 900D or 1000D materials are rough and very wear-resistant, and are generally used as the bottom of the package.

Of course, for some special bags, in order to increase the protection and durability, nylon, such as 1680D, is selected as the whole bag to increase the durability.

PU is the glue on nylon, which is environmentally friendly and harmless. However, most domestic camera bag manufacturers use nitrile rubber as the material, which is low in cost, but not environmentally friendly, toxic and has a very strong smell, so you can judge whether the material is good or not by smelling it.

Can refer to: Naga? BM series, the whole is 1680D? PU, wear-resistant, tasteless