Processed chlorine free (PCF) paper is made using a 100% chlorine free manufacturing process, which is safer for the environment and aquatic life and is certified by the Chlorine Free Association. Made using 100% postconsumer recycled materials. Paper has a 20lb basis weight with a 92 brightness making it ideal for daily use in copiers and printers. Acidfree for archival quality. Meets Air Force Regulation AF 164117, JCP O70, and Executive Orders 13514 and 13423. 500 sheets per ream, 10 reams per box.