... be customized as well. Three types of black papers with their features 1. Wood pulp and ... pollution, no color difference on two sides, also black color in the middle part.2) the original ... than 450 g can be customized.2.Double side black paper 1) environmental protection dye, recycled, no ... than 450 g can be customized. 3. Single side black paper 1) environmental protection dye, recycled, no pollution ...