The Winsor & Newton Watercolour Block is traditionally made 100% cotton artist quality watercolour paper that looks and feels handmade. 100% cotton watercolour paper crafted in Italy and made on a traditional cylinder mould Offers the highest quality surface for smooth, even washes, preserving lustre and transparency of colour. Cotton fibres are internally and externally sized for optimal absorbency and extreme strength. Acid free and free of optical brighteners, offers a bright natural whiteness of archival quality, that does not yellow over time. Each block contains 20 sheets.  Paper weight: 300gsm Paper texture: Rough This range is available in different watercolour paper texture blocks such as cold press, hot press and rough. Available in sizes: 7 x 10inches / 17.8 x 25.4cm 9 x 12inches / 22.9 x 30.5cm 10 x 14 inches / 25.4 x 35.6cm 12 x 16 inches / 30.5 x 40.6cm