Dry paint is a powder mass of fine grinding, particles of which, when sifted, can pass through cells of the smallest diameter. The quality of pigments directly depends on the degree of grinding.
Kinds
To obtain the finished composition, the paint is mixed with a binder mass. Pigments are classified as metallic, synthetic and natural. The latter are created by enrichment, grinding of minerals and rocks with subsequent heat treatment. Metallic compositions are obtained by pulverized grinding of metal alloys, and artificial (synthetic) are the result of chemical processes. The most popular among metal-type pigments was bronze and silver aluminum powder.
Annealing allows you to determine the inorganic and organic origin, for this the powder is poured into a special container or on a sheet of steel and heated. Thanks to carbon, dry organic paint will turn dark.
Security measures
It is important to remember the toxic properties when working with coloring materials of any type. Dry paint, which contains elements of zinc, copper and arsenic, belongs to the category of poisonous. In the presence of such compounds, the method of applying with a brush is more rational, due to this, the likelihood of poisoning can be minimized. Harmful effects are manifested to a greater extent when using atomizers, sprays and other devices with a similar principle of action. Regardless of the application method, strict observance of safety rules and the use of a protective mask or respirator are necessary.
Application
High-quality dry paint for concrete does not deteriorate and does not change the shade in an alkaline environment, when exposed to ultraviolet rays, with systematic drying and as a result of repeated exposure to moisture. These properties are distinguished by ultramarine, ocher, umber, sienna, mummy, cinnabar, manganese peroxide; pigments: orange, scarlet, burgundy and lemon. Their use is possible in all compositions for coloring, others are used in paints of the adhesive type, as well as emulsion.
To obtain certain tones, a mixture of different dry elements is required. Pigments should be soaked in water before use, mixed thoroughly and added to the coloring composition with continuous stirring. When directly mixed with paints, there is the possibility of incomplete dissolution, which will lead to the appearance of noticeable bands on the surfaces subjected to painting.
Powder paint of aluminum and bronze color is used for painting metal planes and metals, subject to dilution with varnish or varnish. The greatest distribution is noted in antique decoration of mirrors, frames for paintings and other interior items.
Alkali-resistant compounds are used for application on ceilings and walls - this is ultramarine, umber, ocher, iron red meerk. A distinctive feature is the ability to use for any paints.
White color
There are various shades of colors: black, red, brown, blue, yellow and white. The latter include lime, white and chalk. Chalk is realized in powder form with a yellow or gray tint, as well as white large lumps. These varieties are divided into three varieties. For application to wall structures, chalk with the finest grinding resembling premium flour is used.
Air lime is most often used for painting exterior and interior walls. The slaked appearance can be mixed with dry pigments that do not change color, such as lime, yellow, red and blue, as well as burnt bone, umber and ocher.
White is a fine white powder. The composition of dry paint of this type includes ground elements of titanium ores, lithopone, lead, steel zinc. The most widespread whitewash came as a component for oil paints and putties.
Yellow and blue colors
Ultramarine and azure belong to the category of blue pigments. Azure is added to enhance the shade in soot and is used for the manufacture of coloring compositions on enamel and oil base. It is characterized by darkening when exposed to ultraviolet radiation, because of this, its use is possible only in internal work. Blue (ultramarine) - dry paint with a green or blue tint, is a component for calcareous and chalky substrates.
Burnt sienna, crowns and ocher are classified as yellow pigments. Ocher has distinctive durability and various tones. For example, after thorough calcination, you can get a red-brown shade called burnt ocher. Crowns include pigments with a range of colors from orange to bright lemon. Burnt siena has similarities with ocher. She gained the greatest distribution for drawing on vertical planes under an ash-tree or an oak.
Red color
Lead and iron minium, the mummy, cinnabar are red pigments. The latter powder paint is relatively resistant and is used for interior use due to exposure to sunlight. Lead red lead is an orange-red color used strictly for outdoor work, due to its high toxicity. The mummy can have a light and dark shade of red. Despite the relative resistance, for outdoor use is not applicable. It can be of natural and artificial origin. During the painting, it has a bright shade, which becomes darker after some time and turns into red-brown.
Black and green
Chrome and lead greens are classified as green pigments. Chromium oxide is a mixture of yellow crowns and azure, with a decrease or increase in the amount of the latter, other colors are possible. Lead greens are also obtained by mixing yellow and blue colors.
Charcoal, soot and manganese peroxide are black powder paints. The composition of soot obtained by processing gas or oil may be mixed only with oil solutions, soap and adhesive.