Special approval is based on freehand brushwork; Flowers and birds and other small freehand brushwork use pure leather, and calligraphy generally uses cotton.
Because of the different proportion of ginseng skin, they are called cotton material, cleansing skin and special skin (special cleansing skin) respectively. Generally speaking, cotton refers to the paper with raw material sandalwood bark accounting for about 40%, which is thinner and lighter; Peeling means that the content of sandalwood bark 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 the paper can withstand and the better the quality.
So you need to look at your own control and habits of pen and ink. Specifically, you can buy one for each person and try which paper suits you.
Think what I said is good, reward more.