Engineering coating is an essential element in home decoration. There are many kinds of coatings on the market. How to choose the right one has become a problem worth considering. Here, we will introduce the selection methods of waterproof coating and water-based coating.
Part 1: selection method of waterproof coating
1. Film thickness inspection [wall engineering should do a good job in home decoration paint selection skills] should use needle puncture method to prick three points every 100 square meters, measure its height with a ruler, take its average value, film thickness should be greater than 2 mm. The puncture should be marked with colored pen for repairing.
2. Water resistance inspection [wall engineering should do a good job in the selection of home decoration coatings] the coating is painted on the cement block in several times, with film-forming thickness of 1.2-1.5mm, placed for 7 days, soaked in 1% alkali water for 7 days, without layering and hollowing.
Part 2: quality inspection of Waterborne Coatings
1. Look at the appearance [wall engineering to do a good job in the selection of home decoration paint skills] to see that a good paint should be free of water distribution, starch, rust, mildew.
2. Look at layering [wall engineering should do a good job in home decoration coating selection skills] look at aqueous solution. After a period of storage, there will be stratification phenomenon. The upper quarter is water solution, and the lower layer is coating particles. Observe whether the water solution is colorless or yellowish, clear and clean with less floating matters. The water solution of poor quality coating is turbid, and there are many floats.
3. Look at the agitation [wall engineering should do a good job in home decoration paint selection skills] look at the paint particles can take a small amount of paint into the water, stir gently, observe whether the water is still clear, whether the paint particles are uniform in size, whether they are relatively independent in the clear water, and there is no adhesion phenomenon. The inferior coating will be turbid immediately after agitation and the particle size will be differentiated.
4. See washability [wall engineering to do a good job in home decoration paint selection skills] to see that the film should not drop powder, and has a certain washability, dirt can be washed with water. After the high-quality products are wiped with wet cloth, the color of the coating is as bright as new, while the coating of inferior products will fade or even be damaged after several times of washing.
5, look at the test report [wall works to do a good job in home decoration paint selection skills] to see that the test report products must comply with the "national standard for synthetic resin emulsion paint" and "interior decoration materials interior wall paint harmful substances limit standards" requirements, testing agencies must be approved by the State Technical Supervision Bureau, with CMA.