The manufacturing process for Envirographic® paper uses hydrogen peroxide instead of bleach, eliminating the production of dioxins usually associated with paper production. It is acid free for a long bright life and has an outstanding opacity for two-sided copying. This paper performs consistently well on low and high speed copiers, laser printers, plain paper fax machines and offset presses. Envirographic® 100 exceeds all state and federal requirements for recycled content. It is also listed on the Government Printing Office (GPO) approved brands list. 500 sheets per ream.