The varnish is intended to form a hard coating on the surface, which will protect the material and give it a more interesting appearance. The composition of the varnish can include polymers, solvents, resins. They are usually applied to wood or metal surfaces. Varnishes can be classified by adhesion properties, that is, adhesion to the base material, by the degree of gloss, by purpose and by the type of solvent in the composition of the material. Also varnishes can be divided according to the type of film-forming material, it can be bituminous, alcohol, oil, alkyd, petroleum polymer, alkyd-carbamide, uitrocellulose, polyacrylate compositions.
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Based on the composition of the mixture, varnishes can be used in various areas and temperature conditions. For example, it is good to use a bitumen llama where there will be a lot of water and moisture, because it is resistant to such substances. But it is not recommended to use it outdoors, as it is not sufficiently resistant to precipitation and temperatures. It can also be used to protect against certain chemicals. This varnish forms a black film on the surface of the material when it dries and gains strength..
