Thursday, June 23, 2011

Stained water-dispersion paints.

Have found wide application paint water-dispersion paints for both interior and exterior finish for buildings. They can be painted wood, concrete, plaster, stone, glass, plastic and other structures. Metal structures covered with red lead before painting for corrosion protection, and can be primed with corrosion lacquer paint. Water-dispersion paints have a number of advantages compared to oil paints. Firstly, they are cheaper, and secondly, unlike oil, dry at room temperature for only 1-2 hours, and thirdly, the remains have not yet dried paint is much easier to remove from the working tool than oil. The last remnants can be removed only with an organic solvent and water-dispersion - water. Another important factor is the fact that when such paint dry, allocated only water vapor. No, hence the specific odors, toxicity. These paints have good adhesion to different surfaces, which makes it easy to repaint their designs without much preparation. Water-dispersion paints have and this advantage: they can be painted and wet surfaces, whereas the oil - just dry. In addition, water-dispersion paints do not burn, and coverage of them overlook the water vapor, "breathe". The most widely used are polyvinyl acetate aqueous dispersion paints. Range of water-dispersion paints for interior applications is currently limited to two brands: HP-BA-27A and WA-BA-224. Provides for release of paints 10 colors, but the market is mainly supplied the paint WA-BA-27A white. Paint consumption in a two-layer coating, 150-200 g/m2. The paint is not recommended for work in areas with high humidity (bathrooms, toilets). This paint can be waterproof if its every kilogram add 20-30 grams of ethyl silicate or ethyl silicate-32-40. To reduce the flow rate per 1 m2 of water-dispersion paints WA-BA-27A should be added to it a little (no more than 5 g per 1 kg) 60% aqueous sodium silicate or sodium silicate (silicate glue office). Clay improves coverage of paint. The addition it allows the dye to 1.5 times larger area than the same amount of ink without the additive. The quality of work is not affected. For rooms with high humidity it is recommended paint WA-BA-224. Paint is available in white; consumption at its two-layer coating - 230-250 g/m2. If necessary, paint diluted with water. For painting walls and ceilings can be used and the water-dispersion paints WA-BA-129 for outdoor use. The amount of paint in a single-layer coating - 140-150 g/m2. You can mix paints of different colors. If necessary, use to podkolerovki organic pigment, which had previously been soaked in water and then add the white paint, mixing it thoroughly. And you can make white paint with different color shades using aniline dyes for fabrics. When painting colorful polyvinyl acetate compounds should not be applied to their bases covered before the chalk whitewash, as well as processed vitriolic, aluminous and alumina primer. In the first case, the film polyvinyl acetate paint behind the base together with Nabeul, while the second - falls unevenly. Therefore, before painting with chalk these surfaces are removed by dry method - using a scraper or spatula, and priming the film cleaned sanded, then treated the surface with oil paint or varnish with added pigments. Old coatings (oil paints, enamels, water-dispersion paints) should be rinsed with a 3% solution of ammonia or soda, and then with clean water. After thorough mixing of paint applied to its surface by brush, roller or spray gun. When properly implemented, water-dispersion paints can be long lasting and durable coating. Paint is recommended to apply to the surface in two layers. Surface of the paint compositions of polyvinyl acetate at a temperature below +8 ° C. At a lower positive temperature compositions thicken, spread over the surface rough layer, drying times to lengthen. When working with a paint box in the room must be closed before its solidification. Paint afraid drafts and frost. Frozen and thawed paint is no longer useable. After working with water-dispersion paints should immediately wash hands and utensils in water, as the hardened paint does not wash out.

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