Dirty paper
Papers that are soiled in any way cannot be recycled. For example, pizza cartons or any type of paper that is stained with food destroys the paper fibers, and this will cause problems in the final stage of recycling.
اری Colored printing paper
بی Oil paper
Papers that have been in contact with oily food or damaged by contact with petroleum products are also non-recyclable. In the final stage of recycling, these fats prevent the adhesion of fibers and reduce the quality.
