Art Essentials Watercolour Studio Paper is a paper designed for bulk consumers of watercolour paper, fine art & design students and hobby artists. The Watercolour Studio Paper is internally & externally sized to give optimal absorption & reproduction of colour. It is 300 GSM thick. This watercolour paper has a cold pressed surface which is slightly more prominent than traditional fine grain surfaces. Watercolour Studio paper has a natural white shade and good erasability. It is acid free, complies with ISO Standard 9706 and does not contain optical brightening additives. The absence of acid & chlorine results in an Archival paper, which will not change / alter with time. Art Essentials Watercolour Studio paper is ideal for most watercolour techniques, gouache, mixed media & dry media like pastel, charcoal, sanguine, graphite, etc. It is also, suitable for ink & fluid Acrylics. The Paper can be used on both sides. It is also suitable for most printmaking techniques.