True stone QiChang home: coating is how to maintain

The paint is a kind of commonly used building materials, but sometimes there will always be such a problem. Let us now and edge xiao take a look at some of the common phenomenon and the solutions. Question 1: discoloration? Why would paint color? The color of the paint change refers to the color of the varnish. Varnish was originally a transparent, colorless or light yellow, after color brown or black. Color paint also have color change, mainly displays in the dim light color paint. The cause of the discoloration: 1. The ester varnish solvent reaction with iron container, exposed to the water. 2. Turpentine oil prone to red brown pigment in iron drum. 3. Gold and silver varnish prone to acid corrosion, leading to paint green, black and lose luster. 4, long storage life and precipitation change color. Note: 1. Nonmetal container applied to shellac varnish is easy to change color. 2, the use of varnish before joining gold and silver powder, don't too early to join varnish stored. 3. If there is no quality problem, can use color coating after stirring well. Question 2: what wall paint color? 1. The ester varnish solvent after contact with the iron container reacts to black. 2. Turpentine oil prone to red brown pigment in iron drum. 3. Gold and silver varnish prone to acid corrosion, leading to paint green, black and lose luster. 4, long storage life and precipitation change color. As mentioned above, these are the main cause of the wall paint color. In order to prevent discoloration, we need to be targeted preventive measures: 1. For shellac varnish discolor easily, non-metallic containers used to dress up. 2, the use of varnish before joining gold and silver powder, don't too early to join varnish stored. 3. If the paint stay too long, it will sink in. it doesn't matter Shake well before use, and stir thoroughly. Question 3: what wall paint cracking and deformation? The deformation of wall paint cracking reasons: 1. Surface is dirty, dirty oil, water or dirt. 2. The underlying surface is smooth, the underlying no polishing or not polishing completely. The underlying use polyester paint, for example, because it has high hardness, good luster, good handle and inadequate polishing, this will naturally lead to poor adhesion between the layers and stripping, like besmear is on glass. 3. Primers are not bad or match. If for primer polyester coating, polishing is not enough. Primer made from nitrocellulose, although the lacquer is not fully dry, but using the contain relatively stronger solvent primer, result in the crack of the paint no obvious undercut even. Cracking is made from wood machinery under the action of inner and outer or temperature and humidity changes caused by the different expansion coefficient. 4. Paint coating before primer is dry, or the first layer of coating is too thick, the second layer coating without dry coating again, this makes the two layers of coatings do not match the expansion and contraction. 5. Cement bottom not completely dry, its ph value is too high, Alkaline too) 。 6, construction conditions, the temperature is too low, temperature, humidity is big, paint film under the action of heat and cold expansion shrinkage, causing cracks. How to avoid the wall paint cracking and deformation: 1. When handling the basal surface, should be thoroughly remove grease, moisture or other dirt. 2. Choose matching primers and paint. 3. The underlying dry completely, then a layer of paint. 4. At the bottom of the cement should be fully dry, ph value should be controlled below 8, sealing and alkali resistant primer. 5. In the right environment construction. Source: stone paint WWW. kobojc。 com