These papers share some characteristics with surface paper  such as moisture resistance or inherent resistance of fibers but do not need a suitable filter for printing or coated with bleached fibers in order to bleaching for printing, etc. These papers can be made from 100% recycled fibers. The papers used in the middle layers of five-layer and seven-layer cartons are of the same type, in which case they only have the role of binding and bulking. Major domestic paper factories produce this paper for cartoon making purposes; this type of paper is produced as a single layer and also for higher strength in two layers.