Gray paper is in the category of cardboard, such as cardboard. This paper is produced from wood fibers and chips and can be recycled. It is actually a kind of thick paper. It consists of two layers of paper with various grams, which are naturally glued to each other by the special plates of these two layers. The thickness of this paper is due to its double layer. One side is white and the other side is gray. It is produced in China, India, Indonesia and South Korea and then enters Iran. Iran has also started producing this paper for several years. Its special application is in the printing, packaging and box making industry. Unlike parchment paper and wax paper, it is not suitable as the best packaging for food and health products. Its direct contact with food or sanitary materials causes food damage and transfer of toxins to it. Compared to packaging papers, it has a reasonable price. Stay with Salam Graphic website.