This treatment affects the performance for surface design, and I have found very little of this new Ph neutral paper to be useful. The pattern rinses off or the applied paints soak right through the sheets. I use the best of the slightly acidic commercial papers, and for most processes I neutralize the acidity by prewetting the papers in a buffering bath. My paints are slightly alkaline. Rag content Rag content is rare today, and refers to the cotton content of some fine papers.
Rag paper is more long lasting than most wood pulp paper.
Handmade paper is made from fiber combinations including cotton, linen, hemp, and many natural fibers. Watermark is a wire insignia or mark inset into the paper making screen which shows on the finished paper when held up to the light. It identifies the maker and type. Grain refers to the orientation of the fibers in the paper. They lay parallel to the path the paper took coming out of the forming machine.