Traditionally, the artist papers were made on the basis of rag, which ensures high lightfastness over time and long preservation. Cotton fibers have the advantage that they are hollow. Rag paper therefore has a higher absorption capacity, which is particularly important in the watercolor area. Watercolor paper Fontaine by Clairefontaine is made of 100% rag and meets the highest standards in the professional artist's field with watercolor: very high absorption of the paper, an even structure even when wet, wiping and mending is possible even with a semi-satined surface.