nontransparent

1.Totally new tilting-grain board, colorful, nontransparent material, wear-proof, best for file security.

全新斜纹板片，色泽鲜艳，不透明材料，不易磨损，文件具隐密性。

2.the nontransparent plastic layer contains 5 percent to 70 percent of calcium carbonate and 1 percent to 60 percent of toughening agent;

不透明塑料层中含有5％到70％的碳酸钙，含有1％到60％的增韧剂；