What are the four performance indexes of wall coatings?

In home decoration, a large part of the area needs to use wall paint, which can be said to be one of the main decorative materials and plays a great role in our home decoration effect and living environment. When consumers buy, they will first know what kinds of wall coatings are available. Which is more suitable? Here is a brief introduction to the types of wall paints.

1. What kinds of wall paints are there?

According to different standards, wall coatings can be divided into different categories. Specifically, it can be classified according to four dimensions: base material, decorative effect, use position and use function.

According to the substrate: it can be divided into organic coating, inorganic coating and organic-inorganic composite coating. Among them, organic coatings include solvent-based, water-emulsion and water-soluble organic coatings, and inorganic coatings include traditional cement and lime.

According to the decorative effect, it can be divided into flat coating with smooth surface, sand wall coating with sandy surface decorative effect and multi-layer coating with concave-convex pattern stereoscopic decorative effect.

According to the use area: it can be divided into interior wall coatings and exterior wall coatings.

According to the use function: it can be divided into decorative coatings and special functional coatings (such as fireproof coatings, mildew-proof coatings, waterproof coatings, elastic coatings, etc. ).

The arrangement and combination of these four dimensions produce a variety of coatings. Generally, the base material and the use area are combined to name coatings, such as solvent-based exterior wall coatings, water-soluble interior wall coatings and inorganic exterior wall coatings.

2. Four performance indexes of wall paint

There are many indexes to determine the quality of wall paint. The following are four indexes that have great influence on quality: hiding power, adhesion, viscosity and fineness. Knowing these indexes of coatings will have a basis when testing the quality of coatings.

Covering power: Apply color paint evenly on the black-and-white grid, and observe the minimum amount of paint used to cover the grid. The greater the amount of paint, the weaker the hiding power, the stronger the hiding power and the less the amount of paint per unit area.

Adhesion: the adhesion between the coating film and the base layer, and the firmness of the combination between the coating film and the coated surface through physical and chemical actions (the coated surface can be a bare substrate or a painted substrate). The wall paint with weak adhesion is easy to fall off, which affects the appearance of the wall.

Viscosity: The viscosity of paint can be measured by a paint viscosity measuring instrument. Viscosity is an important index in the performance of coatings, which has great influence on the storage stability, construction performance and film-forming performance of coatings. The paint is too thick to brush easily, and too thin to sag easily, so the viscosity of the paint should be controlled within a certain range.

Fineness: the size and dispersion uniformity of particles in the coating. Fineness directly affects the smoothness, luster and water permeability of the coating surface. Generally speaking, the finer the paint, the more expensive it is.