
Daler-Rowney Langton Watercolour Postcards Pad NOT 300gsm For many years artists have appreciated the qualities of 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. 12 sheets 300gsm (140lb) watercolour paper, acid-free.