What's the price of the double grey cardboard?
Look from the outside, as upstairs said, "double gray paper is two, the surface is gray, but the inside of the core color and surface is not the same, deeper, the incision is not all gray smooth.".
From the price point of view, because raw materials are not the same, the whole gray cardboard is 100~200 yuan more expensive than the double gray.
From the perspective of raw materials, the gray cardboard of the pulp is more than double ash, fiber length should be long, so full of gray paper more hard, higher stiffness, surface more smooth, it is suitable for high-grade, high stiffness products. For example, high-end jewelry box, wine box.
