Furnish of joiner's products is the finishing process, pursuing two aim - a practicality and beauty.
The First - to protect a tree from undesirable influence of air, light, a moisture, to protect from pollution. Wood is rather sympathetic on humidity of air. Absorbing a moisture, it bulks up, extends, and drying up, is jarred on. The moisture on glutinous seams especially adversely operates, weakening joiner's connections. Under the influence of light many breeds of a tree change colouring, fibres darken, contrast and picturesqueness of a structure is lost.
The Second purpose of furnish - to give to a finished article a decorative kind, to make its beautiful.
Besides, some kinds of furnish promote increase in durability of all product in whole, durabilities of connections, especially glutinous, protect from rotting, from penetration into wood of wreckers and microbes. In these purposes wood cover with a protective layer of drying oil, wax, a varnish, a paint.
Distinguish two kinds of coverings: transparent when the wood structure only is underlined, but it is not closed by a protective film, and opaque when the structure is completely closed by a layer of oil, enamel or other paint. The first way apply, as a rule, to furnish of valuable breeds of a tree and surfaces of other breeds with expressive natural drawing. The second, the most widespread for products from low grades of a tree, serves for formation mainly a protective layer. .
However and opaque coverings can be beautiful, decorative. It is reached by selection of paints of various colours and shades, drawing by their special ways. Such is the oil colouring of surfaces simulating drawing and colour of wood of valuable breeds. Widespread colouring under an oak, in imitation walnut, and also marbled, a skin, etc.
The Most simple, accessible way of an opaque covering is colouring of products from a tree glutinous structures, oil paints, enamels and nitroenamels