paints and varnishes
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Paints and varnishes: types and characteristics

Paints and varnishes are relevant at all times. In addition to giving the surface a decorative look, they protect the building inside and out from external influences. Most of them form a coating that is resistant to repeated wet cleaning using fairly aggressive detergents and disinfectants. Also, modern coatings do not burn and do not support combustion.These factors are decisive when choosing materials for decoration of private houses and apartments, as well as public places - hospitals, clinics, schools. How to understand the variety of varnishes and paints and choose the best for yourself, our review will tell.

Types of paintwork as intended

All paints and varnishes can be divided according to several criteria - type, purpose, chemical composition. According to their constituent components, they are divided into:
  • pigmented - enamels, paints;
  • unpigmented - drying oils, varnishes;
  • auxiliary - solvents, primers, thinners, putties.
By appointment, the entire range of paints and varnishes is divided into the following varieties:
  • Drying oils are transparent liquids based on vegetable oils after heat treatment. Instead of oils, alkyd resins can be used. Form a strong film on wood and metal. Natural drying oils dry for a long time. They are used as protective coatings, the basis for paints.
  • Varnishes - solutions of resins in solvents (acetone, water, ethanol, essential oils). When dried, the varnish forms a solid transparent film that protects the surface from damage and is resistant to various influences.
  • Paints are suspensions of coloring pigments with a filler and a binder. Special additives make the surface matte or glossy. Paints can cover almost any surface: concrete, plaster, wood, metal. There are paints for applying to fabric, paper, drywall, glass, asphalt.
  • Enamels are suspensions of pigments, fillers and binders in varnish. Compared to paints, they form a stronger and smoother coating.
  • Primers are special formulations that provide good adhesion between the paint layer and the surface. Antiseptics are usually added to primers to prevent mold.
  • Putties - paste-like mixtures for leveling surfaces before applying paint or wallpapering to them.
  • Solvents are intended for removal of spots from paint, cleaning of its surface, brushes after work or dilution of thickened paintwork materials. Before you start working with them, you need to make sure that the solvent is suitable for this type of paint or varnish.
The solvent group also includes a variety of diluents, washes, and driers.

Types of coatings according to operating conditions

Before buying the paintwork material, you should carefully read the information on the label. It always indicates what conditions this composition is suitable for:
  • weatherproof suitable for outdoor use;
  • limited weatherproof suitable for use under awnings, on verandas, terraces, indoors;
  • conservation ones are used for temporary protection of products during transportation or storage;
  • water-resistant withstand prolonged contact with fresh or sea water;
  • special - resistant to certain factors: x-ray radiation, luminous - for a certain type of surface (leather, fabric, rubber);
  • oil and petrol resistant inert to lubricants, mineral oils, oil products;
  • chemically resistant, depending on the labeling, are not afraid of alkalis, acids and aggressive vapors and gases;
  • heat-resistant can be operated at temperatures up to 500 °;
  • electrical insulators do not conduct electric current.
Some types of special coatings include primers and putties.

Types of coatings by brightness

The degree of gloss that a particular coating gives is determined by a special device and expressed as a percentage. In appearance, all coatings are divided into:
  • high glossy;
  • glossy;
  • semi-gloss;
  • semi-matte;
  • matte;
  • deep-opaque.
The gloss level of high-gloss coatings is above 60%, deep-gloss coatings - no more than 3%.

Other paintwork classifications

In addition to the classifications described above, paints and varnishes are divided according to the following characteristics:
  • operation in harsh conditions (gas contamination, arctic or tropical climate);
  • as intended - for painting leather, hair, cars, fabrics;
  • by decorative properties - imitation, reflex, fluorescent;
  • according to drying conditions - hot, cold;
  • by the method of applying the composition - roller, brush, spray gun, electrophoresis;
  • according to the sequence of application - primers, impregnations.
Also, paint and varnish materials are divided by solvents, degree of stability of the coating, harmlessness, hiding power, degree of whiteness and many others.

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