... tree fiber. With acid-free 4 deckled edges,etc. Artist paper-Watercolor Pad SFZ007 A4 size 21x29.7cmSFZ008 A3 size ... A3 size 29.7x42cmPaper weight: 300g/m2 12 sheets Artist paper is made of fine selected 100% tree fiber ... deckled edges and professional pressed surface,sutiable for different paintings,including watercolor,gouache,sketch,drawing,pastel,oil,acrylic,etc ...