Art Spectrum® Studio Watercolour Paper Pad (25% Cotton) This paper is Italian made with a cotton content giving the paper a soft texture and enabling it to withstand multiple washes. A synthetic sizing has been used in the manufacture of the paper giving the paper a natural white. The paper is Acid Free which equates to it being above 7pH on the pH scale, and will not yellow or rot, is mildew resistant and is ideal for students and beginners. 185gsm Rough surface Sizes A5, A4 and A3 12 sheet count