Mould-made in Italy, this Professional Watercolour paper is 100% cotton and offers the highest quality surface for smooth, even washes, preserving luster and transparency of color. The cotton fibres are internally and externally sized for optimal absorbency and extreme strength. The 140 lb. paper is acid-free and free of optical brighteners, offering a bright natural whiteness of archival quality that does not yellow over time. Professional Watercolour Blocks are available in Rough Grain, Cold- and Hot-Press surfaces.