look
When choosing coatings, the first two important indicators should be clearly identified from the product packaging, instructions, and testing reports: the number of washings and the VOC and formaldehyde content. The former is a comprehensive indicator of the performance of the coating film, which not only represents the ease of cleaning of the coating, but also represents the water resistance, alkali resistance, and toughness of the coating film. The latter is an environmental and health indicator for coatings. The VOC and formaldehyde content of coatings usually represent the environmental performance of coatings, and the lower the indicators, the better.
smell
Smell the paint you want to buy, the less it smells, the better. If there is a pungent odor or fragrance, it is suspicious. A true odorless coating should only have a faint coating smell, rather than relying on adding spices to mask the odor. Truly good coatings have zero or very low VOC, resulting in minimal odor.
touch
You can identify the quality of the paint film by viewing or touching the sample of the coating. Good latex paint usually has a dense, delicate, and glossy paint film; Poor latex paint is usually rough.
try
Specialty stores of various brands usually display product samples, which can be tested through various methods to evaluate the performance of paint films, such as abrasion resistance, stain resistance, and some coatings may not have their indicators marked. Sales personnel must be responsible for answering their indicators.
brush
If possible, it's best to try the paint yourself. Open the lid of the paint bucket and stir the paint with a wooden stick to see if there are any lumps inside. If there are lumps, it indicates that the paint has been damaged. Use a wooden stick to pick out a little paint and observe its flowing state. If the paint flows continuously in a filamentous shape instead of breaking into pieces, it indicates that the paint has good fluidity and decorative effect. Twisting the paint by hand can feel its delicacy, the finer the better. If the store has a scraper, you can borrow it to scrape and check the fineness, the finer the better. You can use a scraper to scrape the film on black and white paper, and compare its coverage for white and black. The better the coverage for black, the better its coverage. You can also personally brush it with a brush to experience the paint's odor, parallel flow, coverage, and other properties.
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