The development of the economy has brought about an improvement in people's living standards. With the support of the state's rural policies and the rapid development of agricultural science and technology, the living standards in rural areas have been greatly improved, and various households have also raised their requirements for daily life. The rural houses have also been improved. From the past, the loess houses have been turned into brick houses, and the external strong has also been painted and painted. So how do you distinguish exterior paint?
Rural housing in the new era, the exterior wall paint is beautiful and generous
The paint is executed according to the national standard GB/T9755-2001, which is divided into qualified products, first-class products, superior products, but the most important ones of the dozens of indicators (different products produced by different exterior wall paint manufacturers) are:
1, resistant to aging;
2, scrub resistance and water resistance;
3. Contrast ratio (ie opacity).
Of course, users are more eager to identify the advantages and disadvantages of exterior paints in a simple way:
(1) Anti-aging
Place two pieces of glass or ceramic tile side by side, and brush different paints (A, B, C) on top. After drying for 1 hour, place one of the glass in an oven at 200oC for 2 hours, then take out the cooling. After the yellowing, the yellowing is severe and the quality is poor, and the aging resistance is also poor. The pros and cons of anti-sun radiation performance generally:
1 Silicon-acrylic, pure-propylene anti-yellowing is obviously superior to styrene-acrylic paint, and styrene-acrylic paint is superior to vinegar-acrylic paint and common coating.
2 Even if it is a styrene-acrylic paint from different manufacturers, the yellowing will be somewhat different, which is the difference in formulation technology.
(2) Washing resistance and water resistance
1 From the outside of the brush sample: the scouring resistance of the lacquer is greater than the matt lacquer, so the high-grade exterior paint is generally semi-matte (or eggshell light), (the varnish is too reflective, the construction The flatness requirements are high and the aesthetic reasons are not universally selected). The scouring resistance is generally more than 2,000 times, and some even exceed 20,000 times. So it is difficult to compare the difference between high gloss paints with a brush.
2 Comparison of water resistance of light or semi-matte paint: You can paint the film (evenly spread) on the glass, dry it and immerse it in clear water to observe the degree of foaming, peeling and shedding. The more the foaming, the faster the water resistance is.
3 is also two matt paints, the difference in water resistance can also be distinguished:
a, the two paint films are drenched with water, no change is better; there is wet and dark, not good, is the middle and low-grade paint; the worst will be soft wave, may be unqualified.
b. Use the nail to scratch the two dry paint films. The hard quality is good, the resin binder is more, the water resistance is better, the soft one is poor, and the cost is low.
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