Artists for many years have appreciated the qualities of Daler Rowney The Langton. The paper is colour stable, mould made and acid free. The best watercolour papers are acid free to prevent the deterioration of paint and to preserve the integrity of the paper over time. The paper has a rough surface. It is a very versatile paper popular for watercolour and linewash work. It can also be used for pastels, inks, designers" gouache and acrylics. Daler Rowney The Langton Spiral Pads contain 12 sheets of 140lb, 300gsm Rough paper 20x16in.