Misunderstandings in the composition and selection of coatings

Coatings generally consist of four basic components: film-forming substances (resins, emulsions), pigments (including body pigments), solvents and additives (additives).
1. Film-forming substances are the main components of coating, including greases, grease processing products, cellulose derivatives, natural resins, synthetic resins and synthetic emulsions. Film-forming substances also include some non-volatile active thinners, which are the main substances that make the coating firmly attached to the surface of the coating to form a continuous film, which is the basis of the coating and determines the basic characteristics of the coating

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2. Additives such as de-foaming agents, leveling agents, and other special functional aids, such as substrate moisturizers. These additives generally can not form a film and the amount of addition is small, but the process and durability of the formation of the substation film plays a very important role.
3. Pigments are generally divided into two kinds, one for coloring pigments, common titanium dioxide, chromium yellow, and so on, and a kind of body pigments, that is, often called fillers, such as calcium carbonate, talcum powder.
4. Solvents include hydrocarbons. Solvents (mineral oil essence, kerosene, gasoline, benzene, toluene, xylene, etc.), alcohols, ethers, ketones and esters. The main role of solvents and water is to disperse the film substation to form a viscous liquid. It helps to construct and improve some of the properties of the coating film.
Coatings can be divided into oily coatings, fiber coatings, synthetic coatings and inorance coatings according to the main film-forming substances used in coatings;
in our daily life, what are our mistakes when we buy wall paint?
misunderstanding 1. Heavy price and neglect quality
Many people in the purchase of wall paint, it is easy to go into heavy price and ignore the quality of the misunderstanding. Some people think that the higher the price of paint, the better, so when choosing to find the most expensive to buy, but the experimental results show that this is not the case. The other extreme consumer in order to save money, the lower the purchase price, the better, so that the money saved a lot, but the future wall quality and indoor environment is worrying. Therefore, it is recommended that we try to consider the price of the quality of wall paint, generally choose a reputable brand.
misunderstanding 2. It is necessary to re-pack and ignore the inner
consumer always look at its packaging when buying latex paint. But pay attention to the packaging of good-looking paint is not necessarily excellent in-house quality. Some manufacturers in order to attract customers, in the packaging of products, deliberately exaggerated the performance of the product. Therefore, it is recommended that consumers not only look at the product packaging at the same time, but also pay attention to other aspects, such as viewing the detailed testing list of products. Like Japanese latex paint packaging is simple, the effect description is also clear, is a very good choice Oh.
misunderstanding 3. The color card is exactly the same as the color of the wall
Many consumers think that the color of the paint on the color card is exactly the same as the color of the wall painted on the wall, which is a mistake. Because of light reflection and other reasons, when the walls of the room are painted, the color of the walls will look darker than the color card. The colors consumers see on the color card are usually different from the actual colors behind the walls of the paint. Therefore, it is recommended that consumers choose color in the color card, it is best to choose their favorite color slightly lighter number one color, if you like dark wall, you can be in line with the color of the selected color card.
misunderstanding 4. Do not estimate the amount of paint used in advance
Many consumers do not estimate the amount of paint used in advance, afraid of buying less paint, shopping is always more beneficial. This may result in waste of materials, increase the cost of home installation, while the accumulation of too much paint on the construction safety also caused a certain impact. Therefore, it is recommended that consumers must look at the area of the construction area before construction, so as to estimate the amount of material purchased. The simpler way to estimate the amount of paint used is to apply the required amount of paint (L) ( wall area x2.5) / paintable area per liter.
Myth 5. Odorless is environmentally friendly
Many people judge the safety of wall paint by smelling it, and consider low-odor or odorless wall paint to be environmentally friendly. This is a big mistake. Because odorless coatings are not all environmentally friendly and non-toxic by adding flavors or using low-taste materials. The most professional way to judge the environmental protection of wall paint is to see if its environmental indicators meet the standards. There are three key environmental indicators for wall paint: VOC, free formaldehyde, and heavy metals.
know how to buy paint, then we should further learn how to identify.
1. When looking at
to buy paints, we must first see two important indicators from product packaging, instructions, testing reports, one is the number of washes, the other is VOC and formaldehyde content. The former is a comprehensive index of paint film performance, it not only represents the ease of cleaning paint, but also represents the paint water resistance, alkali resistance and paint film toughness. The latter is an environmental health indicator of coatings. The VOC and formaldehyde content of coatings usually represent the environmental performance of coatings, and the lower the indicators, the better.
. Smell
paint you want to buy, the smaller the better. If there is a pungent smell or fragrance is suspect. A true clean-smell coating should only have a light coating flavor, not a fragrance to mask the smell. Really good paint, VOC is zero or very low, so the taste is very small.
3.
the quality of the paint film by looking at or touching the paint's model. Good latex paint is usually dense, delicate and shiny, while poor latex paint is usually rough.
4.
Stores of various brands usually display models of products that can be used in a variety of testing methods to see the performance of the paint film, such as: scratch resistance, stain resistance, some coatings may not be labeled on its indicators, sales staff must be responsible for their indicators to answer.
. Brush
if possible, it's best to try the paint yourself. Open the coating bucket cover and stir the paint with a stick to see if there are any lumps inside, and if there are lumps, the paint is broken. Use a wooden stick to pick out a little paint, observe its inlet state, if the paint into a silky continuous inflow, rather than broken into a piece, indicating that the paint flow is good, good decorative effect. With a hand on the paint, you can feel its delicateness, the finer the better. If the store has a scraper, you can borrow it to scrape it to see the fineness, the finer the better. You can use the scraper on black and white paper scraping film, you can compare its white and black cover situation, the better the black cover, the better its cover, you can also brush it yourself with a brush, experience the paint smell, flow parallel, cover force and other performance.
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