Arches Aquarelle is optimal for both watercolor, and for all wet techniques, ink, gouache and acrylic. This paper is manufactured following the traditional formula in round shape machine. Glued in the dough with natural gelatin: an exclusivity ARCHES. 100% cotton paper. Cotton provides its beauty to paper, permanent natural whiteness, inimitable touch, guarantees its strength and perennial. Preventive fungicide treatment against molds. Alkaline reserve, acid free, optical bleachers (permanent according to ISO 9701).