Xuan paper can be divided into three categories according to the proportion of materials: cotton, leather and cotton. There are single publicity, double publicity, two floors and three floors, and the specifications are 4 feet, 6 feet, 8 feet, 2 feet, 4 feet and 8 feet.
Generally speaking, cotton material refers to the paper with raw material sandalwood bark accounting for about 40%, which is thinner and lighter; Clear skin means that the amount of sandalwood skin reaches more than 60%; The content of sandalwood skin, the raw material of special leather, is above 80%.
The heavier the leather composition, the greater the tension that the paper can bear and the better the quality; The corresponding use effect is: the higher the proportion of sandalwood, the richer the ink layers, the better the ink moistening effect, and the more able to withstand repeated rubbing with pen power without damaging the paper surface. This may also be one of the reasons why cotton Xuan paper is mostly used for calligraphy and leather paper is mostly used for painting-it's not that you can't write with clean leather or special leather paper, but cotton Xuan paper can basically meet the needs of calligraphy (unless your calligraphy style requires repeated painting in the same place with a pen).
Attachment: The simple way to distinguish raw propaganda from cooked propaganda is to see whether there are reflective silver alum crystals on the paper, which is cooked propaganda, not ordinary raw propaganda.