There are three classes of paper that can be utilized as feed stocks for making reused paper: process broke pre-customer waste, and post-shopper waste. Mill broke is paper trimmings and other paper scrap from the produce of paper, and is reused inside in a paper process. Pre-buyer waste is material which left the paper process yet was disposed of before it was prepared for customer utilize. Post-purchaser waste is material disposed of after buyer utilizes, for example, old folded holders (OCC), old magazines, and newspapers. Paper appropriate for reusing is called "scrap paper", frequently used to create formed mash bundling. The modern procedure of expelling printing ink from paper fibers of reused paper to make deinked mash is called deinking.