Why is it difficult to color meticulous Chinese painting after dyeing several times?

Meticulous painting has been dyed several times, and the main reason why the pigment is not easy to color is that the glue alum water is too strong. Meticulous painting has "three alum and nine dyes", which refers to meticulous painting with heavy colors and is the technical name of Chinese painting after repeated rendering. In order to accurately express the physical structure of objects and achieve clear, beautiful and heavy artistic effects, it is necessary to repeatedly render and spin products to obtain meticulous and heavy colors, which was 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". That is, alum water and alum water are mixed with glue three times. In order to keep the color bright and lint-free, it is a very important technology in meticulous painting to prevent different levels of colors from being separated from the previous colors after repeated coloring.

If the picture looks dirty, the main reason is that the color is too heavy, the alum is not served in time, and the glue alum is too thick.

The function of rubber alum:

The meticulous painting and heavy color painting of Chinese painting are vivid and vivid. On the one hand, due to the choice of raw materials, most of the pigments used in traditional Chinese painting are processed and refined from natural pigments, among which mineral pigments account for the largest proportion. On the other hand, in painting, except ink painting and color freehand painting, almost all colors are fixed with glue alum water. Especially when creating meticulous and colorful works, some light alum water should be coated every one or two layers. Because of the function of glue alum water, the two colors after covering or rendering will not be confused. ? Use alum to fix the color without peeling. Although family of origin is insoluble in water, it can be fixed on the picture. This is what glue and alum do. Therefore, it is a compulsory course to learn Chinese painting, especially meticulous painting and rock painting.

Colloidal alum water collocation;

Alum is alum, and its chemical name is potassium alum, which is a translucent and colorless crystal block. The essence of alum is to play an isolation role in painting. When alum is brewed, the water temperature should not exceed 70 degrees. Too hot will destroy the properties of alum.

Gelatin is generally used as glue and is made from pigskin. Good adhesive with high transparency and easy dissolution. The suitable soaking temperature is 60 ~ 70℃. If the pledge is not used up, it can be put in the refrigerator to prevent rancidity.

Colloidal alum water preparation ratio: alum 30g gelatin 60g+ 1250g water (that is, two colloids, one alum, two catties and a half water). That is to say, the ratio of glue to alum is two parts of glue and one part of alum, and appropriate amount of water is added. However, in actual use, according to different seasons, different proportions of colloidal alum water are prepared, such as:

The proportion of alum in summer is about: six alum,

The proportion of rubber alum in spring and autumn is about: seven rubber and three alum,

The proportion of rubber alum in winter is probably: eight rubber alum.

Constant water volume

The rule of alum usage is that the hotter the weather, the more alum is used, and the colder the weather, the less alum is used. Generally speaking, it is difficult to color a large rubber slider pen, but it is delayed. Alum hurts the paper, and the drawing paper is crisp and astringent. When mixing alum, you can try it with the tip of your tongue first. The glue is too sticky and the alum is too astringent, making it sweet and slightly astringent. Tighten the lid of the prepared alum solution and put it in the cold storage area of the refrigerator. Don't freeze, take it away. When dyeing, use a wool pen dipped in glue alum water, and the pen should be connected in the right direction. Can't repeat.

The dosage required for meticulous painting or heavy color painting is four feet and three paintings. The dosage formula for four feet and three paintings is alum 10g+ gelatin 20g+4 17g water.

1. The original alum can be ripened with glue alum solution, and the original hemp paper can be ripened with alum, which can prevent the picture from frosting and bleeding, so that the paper does not absorb glue, which is beneficial to mineral fixation.

2, repeated coloring, glue and water are not easy to penetrate into the fiber, the paper does not bubble, and the fastness is increased.

3, make the paper more sticky, and the painted color is not easy to peel off.

4. After painting, brush it with alum water, which is waterproof and moisture-proof, and you can clean the painting later.

5. Brushing glue alum water on the color layer has waterproof and color fixing effects, which is beneficial to the pile-up dyeing of the upper pigment.

6. Adding colloidal alum water to pigment can increase its opacity and has good hiding power.