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Sorted Office Paper (SOP) is paper typically generated by offices. It can be shredded or unshredded, printed, and may contain colored papers. It has a minimum of 60% woodfree paper, free of carbon and principally free from carbonless copy paper (CCP)/no carbon required (NCR), less than 10% unbleached fibers including manila envelopes and file covers, less than 5% newspapers and packaging.