Paper recycling is the process of recovering waste paper and reprocessing it into new paper products. There are three categories of paper that can be used as feedstock for making recycled paper: mill broke, pre-consumer waste, and post-consumer waste. Mill broke is paper trimmings and other paper scrap from the manufacture of paper, and pre-consumer waste is material that left the paper mill but was discarded before it was ready for consumer use. Post-consumer waste is material discarded after consumer use, such as old newspapers, old magazines, and used paper towels.