How to deal with the glue alum water in meticulous Chinese painting? What is the specific ratio?

Generally, the proportion of rubber alum is two-two rubber and one-two alum, two kilograms and a half water. The proportion of rubber can be less in winter, and it can be increased in spring and summer due to the weather. Summer is six glues and four alums, winter is eight glues and two alums, and autumn is three glues and seven alums. More specific, but the distribution should be flexible.

Fine brushwork and heavy color can only be obtained through repeated rendering and repeated spinning, which is called "three alum and nine dyes" in ancient times. After several times of dyeing, the paper silk touches the bottom of the paper, and then it is easy to be turbid and uneven.

Gently apply a thin layer of rubber alum water to stabilize its bottom, dry it and then dye it, so it can still be fresh and moist. Dye alum every few times. You can dye it eight or nine times. This method should be "light in color, gradual in depth and thin in thickness".

Extended data

Gelatin can not be used for alum silk, because lac is the best for silk injury, and it is sealed after being soaked in warm water in spring and autumn. The next day, stir with boiling water, not with fire. Sericin boiled by fire floats on the surface. After the glue alum water is mixed, it should be as warm and yellow as the light honey water. In summer, the glue is poor, so it can only be used after being filtered by filaments.

There is a kind of shredded oil and vermicelli, which should be brushed with hot saponin water before sticking alum. Be sure to find a sunny day when using alum silk, and the brushed silk must be dried in the shade. Glue alum water should be brushed on the back of silk, such as gold stationery. Brush a thin layer of light alum water before painting, so that the ink will drop when painting, and then brush a layer of light alum water after painting, so that the golden stationery will not crack and stick.

Reference source: Baidu Encyclopedia-Three Alums and Nine Dyes