well. If the glue solution is turbid, there are many paint colors or internal floats, even covered with a solution surface, indicating the quality of the paint
Poor or storage shelf life has passed and should not be used.
Second, look at the fineness of the paint particles. We can test with a glass of clear water. Take a small amount of paint into the water, gently stir, if the water in the glass is still crystal clear, paint particles in the water is relatively independent, there is no adhesion phenomenon, and the particle size is more uniform, indicating that the paint quality is very good. If agitated, the water in the cup becomes turbid immediately, and the size of the particles is differentiated, indicating that the quality of the coating is not sufficient, and it is not necessary to do so. Now that you have chosen a coating, you should have taken care of it. At the same time, you should also pay attention to the product's brand image and people's reputation. These are all reflections of product quality assurance.
What to pay attention to buy paint:
Due to the erosion of various unfavorable natural factors, the paint is more affected by the natural environment than the general decorative materials. Therefore, in the face of more than 100 varieties of coatings on the market today, the following principles should be followed when purchasing.
1: According to the different parts of the building. Different parts of a building have different requirements for their surface decoration and protection. For example, the paint used on the interior wall surface is close to people, visible, and tangible. Therefore, it requires strong adhesion of paint, fine texture, and resistance to differentiation. Good air permeability; kitchen, bathroom, washroom paint should have waterproof, mildew, easy to scrub performance.
2: According to the different materials of the building structure. The different materials and materials of the building structure have different requirements for the paint. The concrete and cement mortar base layer should be preferentially selected for the polymer-based water-based paint; the lime-water base layer is preferred to use the polyvinyl alcohol-based water-based paint; the wood base layer and the metal base layer are preferentially selected Solvent coating.
3: According to the time interval between the decoration of the building and the next decoration. If the time between the decoration of the building and the next decoration is longer, a durable paint shall be used; if the interval is short, the paint with poor durability may be used. How to prevent discoloration of paint?
The new brush's door color is deeper than the paint itself. Is the paint discolored? In fact, the discoloration of paint mainly refers to the discoloration of varnish. The varnish was originally a clear, colorless or very light yellow color, which turned brown or black after discoloration. The color paint also has the phenomenon of discoloration, which is mainly manifested in the darker color of the paint.
There are several possible causes of paint discoloration:
(1) The ester solvent in the varnish reacts with the iron container and turns black after it encounters water.
(2) Turpentine produces red brown pigment easily in the iron drum.
(3) The gold and silver powder and varnish are prone to acid etching, which makes the paint color green, dark, and lose luster.
(4) The storage period is too long and the sediment is discolored.
The methods of prevention and control are:
(1) For shellac varnish that is most susceptible to discoloration, store it in a non-metallic container.
(2) Add gold powder and silver powder before using varnish and do not store it in varnish prematurely.
(3) If the coating is discolored by precipitation, if it is not a quality problem, it can be used after it is fully stirred.
three. How to identify the quality of the paint?
The quality of the paint is not good for the outsiders but I don't know how to tell it. Now I'll tell you a little girl to see the quality of the paint through two aspects. On the one hand: look at the glue protection solution. After the coating has been stored for a period of time, the coating will appear to be delaminated, the coating particles will sink, and a layer of glue protection solution will form on the upper layer of more than a quarter. We can see that the solution is colorless or yellowish when selected. Clear and clean, with no floaters or very little, which means the paint is of good quality. If the gum solution is turbid, showing a lot of paint color or the number of internal floaters, even covered with the surface of the solution, indicating that the quality of the coating is not good or the storage shelf life is over, should not be used.
Second: Look at the fineness of the paint particles. We can test with a glass of clear water. Take a small amount of paint into the water, gently stir, if the water in the cup is still clear bottomed out, the paint particles are relatively independent in the water, there is no adhesion suppression phenomenon, and the particle size is more uniform, indicating that the coating quality is very good. If agitated, the water in the cup becomes turbid immediately, and the size of the particles is differentiated, indicating that the quality of the coating is not sufficient, and it is unnecessary to do so.
It is best to choose paints with well-known brands such as Nippon, Dulux and others. But well-known brands of paint are easy to buy counterfeits in the market, so it is best to go to large building materials supermarkets instead of building stores. However, the price of a large building materials supermarket is relatively high. It is best to go directly to the brand's local office to buy it, or to buy it in the area's general agents. First, fidelity, and second, the price is much cheaper than the market. Large dealers The distribution network is also very sound and can be delivered to the door or construction site.
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