This paper is the original Arches, known as Natural White. This 100% cotton fiber paper is acid-free and pH-neutral. Ideal for watercolor painting, as for all wet techniques such as ink, gouache and acrylic. Details: Natural white 22" x 30" (56cm x 76cm) sheet size 140 lb/300 gsm 6 packs (3 sheets per pack, 18 total sheets) Cold pressed