The color matching in sketch is based on the correct observation and understanding of the color relationship of objects. When mixing colors, you can't look at one piece in isolation, adjust one piece and draw one piece. We should consider the overall hue and color relationship, and decide each color from the whole. The colors of gouache sketch are not easy to connect. On the basis of clarifying the relationship between colors, try to adjust the colors of several large color blocks and prepare for redrawing. Don't be divorced from the whole, look at one piece, adjust one piece, draw one piece, and adjust one piece for another. The color of gouache painting is dark when wet, light after dry, and the wet and dry changes obviously. If the classic gouache painting Tianhe White Horse uses more powder (white) in color matching, or draws a thicker color layer, then paints it and uses paper with strong water absorption, the dry and wet changes of the pigment will be more obvious. It is difficult to make a correct estimate of gouache color matching. It is difficult to connect, cover and modify colors. This is an obvious feature and difficulty of gouache painting. Pay special attention to this problem when you are a beginner. So we should draw heavy colors at the beginning. Generally speaking, when painting is wet, the color is wet. After painting in one breath, the color relationship is easy to grasp. If the color is dry, connect the colors and cover them. Pay attention to the wet and dry changes of the colors.

Use of water

Although the use of water in gouache painting is not as important as that in watercolor painting, it cannot be ignored. Water mainly plays the role of dilution and medium. The appreciation of color, the use of pen and the change of color thickness in gouache painting are closely related to the use of water. Gouache (Higher Education Press) Generally speaking, proper use of water can make the picture smooth, moist and rich. Too much water will reduce the chromaticity, resulting in water stains, stains and water color deposition. Moreover, insufficient water will make the color dry and sticky, making it difficult to use a pen. Usually, it is advisable to cover the background color smoothly with pen water. Generally, you can use more water in dark places, imaginary places and distant places to enhance your empty inspiration and transparency. In terms of painting steps. Use more water when laying on a large scale, so that the color layer is thinner and easier to color. In the process of painting, the water is too dirty to be replaced in time. Especially when painting brightly colored parts, the water for color matching should be clean.

Use a pen

Because gouache can use all kinds of pens, the techniques of gouache are extremely rich. And it's based on oil painting. In the development process of Chinese painting and watercolor painting, it has been continuously developed. Common brushwork in gouache painting.

"Flat brushwork"-the handwriting is hidden. The color layer of the picture is flat;

"Scattering"-the handwriting is exposed, but the thickness of the color layer has no obvious change;

"Thick points"-the color levels are mixed and overlapped, and the colors are thick and light;

"stippling"-using the principle of mixing light and color, using dense small strokes (color dots) to shape the image. This kind of brushwork is rarely used and difficult to master, so beginners should not imitate it too early. )

Knife painting technique

In addition, gouache also absorbed the knife painting technique of oil painting. You can draw with oil painting knife, gouache photo album (17) or draw with homemade bamboo knife. When gouache absorbs the brushwork techniques of other paintings, it must start from the characteristics and performance of gouache, so as to enrich the techniques of gouache and enhance the expressive force of gouache. Generally, when drawing virtual places, distant places, dark places and shadows, the strokes should be blurred and the colors should be flat and thin to increase the sense of virtual distance. When drawing near, solid and bright parts, the brush strokes should be exposed and the color should be thicker to enhance its solid, prominent and clear effect. Of course, these all need to use different brushwork from the processing intention of the whole painting. Brush strokes also have a holistic problem. The brushwork of a painting should also be changed and unified to form a sense of rhythm. It is necessary to prevent the indiscriminate use of pens that lack the overall handling intention.

connect

Gouache painting is characterized by fast color drying and significant changes in wet and dry conditions. Using water makes the color flow and seep on the picture, which is easy to produce water stains. Therefore, mastering cohesion skills is very important for gouache painting. The connection of gouache painting is mainly divided into three ways: wet connection, dry connection and pressure connection.

The so-called wet paste means that the adjacent color blocks are connected with the second and third colors when the former color is not dry. Or two adjacent colors meet. Or when a piece of color is wet, add other colors and let it penetrate. Or dip several different colors in different parts of the pen, and use the moisture in the pen belly to make it naturally connected when drawing on paper.

The so-called dry connection means that when the previous color has dried up, adjacent color blocks are connected with the second and third colors.

The so-called pressure welding is the adjacent color block (the turning point of shape or different objects). The first color block is slightly larger than the appropriate shape, and the second and third color blocks form a sense of rhythm. It is necessary to prevent the indiscriminate use of pens that lack the overall handling intention. When connecting, press on the previous color and press out the shape that the previous color should have. Pay attention to the hiding power and adhesion of color (color pressing) when pressing color. Generally speaking, the pressed color is slightly thicker than the painted color block.

involve

The so-called covering is to draw one or more colors on the painted color layer. The main function of covering can be summarized as two points: first, the technique of creating images by overlapping gouache paintings of different colors; The second is the modification method. The hiding power of gouache color is strong, but there are differences. In addition, when using clear water in painting, it is easy to make the background color (covering color layer) rise if you don't master it well, resulting in water stains and dirty colors. Sometimes it is deliberately covered with a very thin color to reveal the underlying color. These specific effects are difficult to estimate, and it is not easy to master the covering skills, so you have to ponder it slowly.

Colour ...

Inherent color

Inherent color is the inherent color of the object itself. Grasping the inherent color is mainly to accurately grasp the hue of the object.

Gouache painting is very important because of the area occupied by the inherent colors in an object. Generally speaking, the most obvious place where an object presents its inherent color is the middle part between the light receiving surface and the backlight surface, that is, the gray part in the sketch tone, which we call halftone or intermediate color. Because in this range, the object is less affected by the color of external conditions, and its change is mainly the change of lightness and hue itself, and its saturation is often.

(1) When drawing a manuscript, just like sketching, first determine the position and proportion with a pencil, and don't use an eraser to avoid damaging the paper and affecting the coloring effect. Then shape it with color. According to the hue of still life, it can be shaped with ochre brown or ultramarine blue. The color line can be a little heavier and can be shaped.

The color is slightly bright and dark, paving the way for the next coloring. If you have a strong modeling ability, you can also draw a draft directly with colored lines, without showing light and shade, and color directly.

(2) After the large color tone is determined, quickly observe the relationship between the overall color tone and the large color block, so as to determine the Bo Tu as soon as possible. At this moment, regardless of the shape and brush strokes, boldly follow the fresh color impression, resulting in the color environment of the picture. Some people are eager to make a specific description after finishing the last color. The relationship between large color blocks should be further adjusted to make the relationship between colors and the overall tone consistent with the actual feeling.

(3) On the basis of correct relationship, further concrete shaping is carried out, starting with the main objects of the picture and completing them one by one. It is easy to master the dry and wet changes of an object and shape the color changes of different sides of light and backlight. At this time, your eyes should always be swept around, starting from the local area but not falling into the local area. According to the relationship between objects, backgrounds and other objects, master proper limit, and the details can be further described. At this time, the color should be appropriately bold, which can keep the correct part of the background color and increase the color level of the picture.

(4) The description of trivial and redundant details can be omitted, but the description of important details showing the characteristics and texture of objects should be strengthened and the finishing touch should be made. The details should be integrated into the whole. The last stroke is the most important, it will not be covered and revealed to the audience.

(5) Adjust and complete a still life sketch outside the studio. As a basic exercise, eight hours is generally appropriate, and strive to be profound and accurate. After three or four hours of proficiency, you can also perform more fully. After painting for a long time, the eyes are easily tired, the color sense is easily weakened, and the specific description is easy to forget the whole. When the sketch is close to completion, restore the first impression and check the picture: whether there are some places that destroy the whole, whether the colors of parts and details "jump out" of the picture, and whether there are other problems. After inspection, adjust, modify and deal with it. Mistakes, such as painting too thick, should be washed away before painting until the painting is finished. To what extent should wet and dry techniques be controlled in gouache painting? What are the application fields? The wet and dry techniques used in gouache painting mainly refer to the amount of water and white powder used in color matching.