Overdyeing, dot dyeing, cover dyeing and joint dyeing are the four major techniques of Chinese painting overdyeing.
Set dyeing in painting, mainly in freehand flower and bird color painting, will be different colors, divided successively stop diffusing, that is, when the first color is dyed, to be dry, then dye another color, so gradually add dyeing, so called set dyeing.
When overdyeing and overdyeing, we must diverge according to the direction of the previous dyeing, and from strong to light, from small to large area, to dye the image of the plane sense. The result of interdyeing can be obtained by matching several colors, such as indigo and sophora flower can be interdyed into official green or oily green, indigo and yellow millet can be interdyed into blue, indigo and reed, bayberry bark can be interdyed into black and so on.
Point dyeing: First, point to the pen dyeing Han, that is, painting, Yan Zhitui of the Northern Qi Dynasty, "Yan's Family Instructions and Miscellaneous Arts": "Prince Wu Li can portrait, sit on guests, random point dyeing, that is, into a number of people, to ask children, all know their names." One is that painters decorate scenery and dye colors in their paintings.
The dot dye here belongs to the latter. That is to say, a technique used by painters in painting: first dip some lighter colors with brushes (or even just some water), then dip some dark colors on the tip of the pen, and then rub them out on paper. People call this technique "dot dyeing". In this way, the result will be a natural change of light and shade in a stroke. If drawing petals, first dip in pink with a pen, then dip some magenta with the tip of the pen. The petals are bright and tender from thick to light.
Chinese painting, when coloring, first lay the bottom, then cover the color, this method is called cover dyeing.
Usually, the background color is first laid with rendering method, and the color should be thicker and heavier, which can be added layer by layer. From deep to light, we should show its light and shade and level. Then according to the needs of flat painting once or twice, the color should be light. The selection of background color and cover color should be based on the characteristics of the object itself. The purpose is to make the two complement each other and produce thick, distinct, complex and rich color effect.
This dyeing method is far more pure and bright than the new color produced by mixing two colors. If you use anthocyanine to lay the bottom, you can use emerald; if you use grass-green to lay the bottom, you can cover it with emerald; if you use ink to paint landscapes, you can cover it with anthocyanine and ochre.