What are the advantages and disadvantages of spraying and roller coating?

Spraying is a spraying method which is applied to the surface of the coated object by dispersing it into uniform and fine droplets through a spray gun or a butterfly atomizer with the help of pressure or centrifugal force.

Advantages:

1, the spraying construction period is relatively short, and large-area feeding can be completed in a short time.

2. The wall surface produced by spraying process is smooth and delicate, and has good hand feeling.

3. Spraying is very flexible when dealing with gaps and corners.

4. The paint is used for spraying, and there is no water mixed, so the film is thicker.

Disadvantages:

1. Early protective treatment is a heavy workload, time-consuming and labor-intensive.

2. Spraying is more expensive than ordinary painting (almost more expensive than ordinary painting 10%).

3. In the later period, the wall surface was damaged due to bumping and needed to be repaired, and the color difference was relatively large.

Roller coating can effectively control the accuracy and flatness of the plate, successfully eliminate the bumps and wrinkles brought by tradition, and make the architectural decoration color uniform, delicate, soft and bright.

Advantages: the materials used are very paint-saving, and the color difference where painting is needed is relatively small.

Disadvantages: workers are easy to cut corners and the moisture ratio is too high. Corner processing is troublesome.

Extended data:

There is also a construction method called bullet coating, which should be coated with mica or fine materials. During construction, first brush 1 ~ 2 layers of paint on the surface of the base as background paint. After the primer is dried, it can be shot peened. Doors and windows and other parts that do not need to be painted should be covered. After large-area bullet coating, if the decorative effect is affected by uneven local bullet points or unsatisfactory embossing, it should be repaired. The paint used for repair shall be the same color as that used for bottom brushing or bullet coating.

Paint spraying wall refers to the method of spraying cement paste on the decorative base with special paint spraying tools. Bullet-proof wall is divided into base, surface and cover, and the base material is selected according to different wall materials, such as cement mortar, polymer cement mortar, metal plate, asbestos board, cardboard and so on. The surface layer is polymer cement mortar. In order to protect the wall and prevent pollution, paint is generally sprayed on the surface of the wall.

Please don't work in wet or cold weather (the temperature is lower than 5 degrees Celsius and the relative humidity is higher than 85%), otherwise the expected painting effect will not be achieved.

References:

Baidu encyclopedia-wall coating material