Brush :
Coating is the oldest surface technology in the history of production application. Manual brushing is a method of painting the surface of an object by dipping the paint with a paint brush. It is also an ancient and most common construction method. A common brush is a wool brush. This construction method is generally the most widely used in interior decoration and decoration. The advantages are: save paint, simple construction, simple tools, easy to master, flexibility, wide range of application; Disadvantages are: high labor intensity, low production efficiency, for fast drying, poor leveling paint is not very suitable, and easy to leave brush marks, flow hanging and paint film thickness is not uniform phenomenon, affect the flatness and beauty of the film.

Roll coating:
Roll coating is a coating method that rolls the coating on the workpiece surface by dipping the coating in the roller. Generally divided into manual roll coating and machine roll coating two, suitable for flat workpiece coating. Most suitable for large surface painting, construction efficiency is lower than spraying (especially manual roller coating), but higher than brush coating construction 2-3 times. The advantages of roller coating are less paint waste, no coating dust, less pollution to the environment, machine roller coating mechanization, high work efficiency. The disadvantage is that the paint film surface effect is slightly poor, the painting equipment is expensive, the scope of application is small, only suitable for the painting plane of the workpiece.

Dip coating:
Dip coating is the simplest painting method, which is to put the object directly into the container containing the coating for a certain time, so that the coating directly penetrates into the object to be painted to achieve the purpose of painting. Construction viscosity is generally -4 cups under 11 seconds. The advantages are strong permeability, simple construction; The disadvantage is that it can not reach the relatively thick film, easy to hang.

Air spraying:
Spraying is a coating method that uses compressed air or other means as the power to spray the paint from the nozzle of the spray gun and form a uniform coating film. Its construction efficiency is several times or even dozens of times of the manual way such as brushing, especially suitable for large area painting operations. For gaps, holes, inclinations, curves, concave and convex and other shapes of the surface can be constructed, and the paint film is smooth and smooth. The advantages are simple, cheap construction equipment, high construction efficiency, high quality paint film, complex shape objects can be painted; Disadvantages are low utilization rate of paint, large consumption, easy to form paint dust pollution, great impact on the human body and the environment.

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