High White Smooth 315gsm, is the ultimate in digital art paper quality. With Its 100% Cotton rag fibres, it is acid-free & p H neutral, ensuring the longest of image life. This heavy weight smooth matt paper has a luxurious quality & feel. Highly recommended for Giclee printing, It has been accredited by the Fine Art Trade Guild as being of ' Archival Quality' when used with pigment inks giving an image life of 85 + years.