The use of oily materials and natural resins as the main medium for painting is oil painting, which is the traditional egg color and egg white and other emulsion-based materials evolved. Oily material is characterized by slow drying, shiny and can be covered repeatedly coated with thick. Oily material has a strong expression and rich technical effect, it can be said that almost all the other materials and paintings include the technical characteristics of species. The characteristics of the oily material allow to delineate the shape of the object in depth, which can show the rich and lifelike color relation of the object, which accords with the desire of the people to reproduce the visual reality in the 14th century, and promote the development of western painting to the realistic development. Oil painting has been in the Western painting after the birth of the dominant position, and worldwide development, which also proved the superiority of oily materials. The transition from water-based materials to oily materials is a long process of change that has lasted for thousands of years and is a major breakthrough in painting techniques and even in art history. The use of oil and resin is one of the important features that distinguishes western painting material techniques from oriental painting techniques.
Pull is sometimes need to draw a strong line of painting and objects such as the edge of the sharp edge of the sword or glass, such as the side of the glass, then use the knife to align the color with the blade side of the color on the screen pull the color line or color , Painting a solid shape to draw a certain affirmation, is a brush or other methods difficult to achieve.
Rub is the pen recumbent, brush the abdomen in the screen drum wipe, usually wipe with less color when a large area can be formed not very obvious strokes, but also shop the underlying color of the common method. In the dry background or the ups and downs of the texture on the brush with the brush method can draw a similar effect of Chinese painting white, so that the underlying texture is more obvious.
It is the bottom of the knife in the wet color layer gently press down after the mention, the color of the surface will have a special texture. In some of the need to depict a special texture of the place with suppression techniques can achieve the desired results.
The earliest use of human pigment is based on water-soluble materials. It is natural that diluents and binders, such as water, gum or animal gum, were naturally used in the early paintings as natural pigments. They were easy to draw and simple to use, which was consistent in the early Eastern and Western paintings. Today's watercolors and gouache pigments are all water-based media, the expression of free, smooth, can produce light, transparent effect, but also Chinese painting, Japanese painting and other oriental painting the main material type.