This 310 gsm paper is a wonderful bright white with exceptional smoothness for excellent color and black & white photographic output. It is 100% cotton fiber and mould-made and is PH neutral, acid free and lignen-free. This heavier weight paper is specifically engineered for wide-format inkjet printing and is water-resistant [water-fast] when used with our pigment ink set. When printing on the Hi Fi JET or CAMMJET, use the highest head position to produce best quality results. PQM-TRBW-40-47: Tuscan Rag, Bright White, 47" X 40'