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Wood stain is a type of paint used to colour wood.It consists of colourants dissolved and/or suspended in a vehicle or solvent.Vehicle is the preferred term, as the contents of a stain may not be truly dissolved in the vehicle, but rather suspended, and thus the vehicle may not be a true solvent.
When free hydroxyl groups are transformed to acetoxy groups, the ability of the wood to absorb water is greatly reduced, rendering the wood more dimensionally stable and, because it is no longer digestible, extremely durable. In general, softwoods naturally have an acetyl content from 0.5 to 1.5% and more durable hardwoods from 2 to 4.5%.
Numerous naturally-occurring stains exist, such as rust on iron and a patina on bronze, [3] as do accidental stains such as from ketchup and oil on fabrics and other materials. Different types of material can be stained by different substances, and stain resistance is an important characteristic in modern textile engineering. [citation needed]
Wood can be stained using dyes or pigmented finishes. These finishes are available in a wide variety of colours, many of which are not part of the natural colour palette of wood, for example, blues and greens. Pigmented stains tend to highlight the grain (and also sanding scratches), whereas dyes do not have this effect and are more transparent.
Behr Paint Company (stylized as BEHR) is a supplier of architectural paint and exterior wood care products to the American and Canadian do-it-yourself markets. BEHR manufactures interior and exterior house paints, decorative finishes, primers, stains and surface preparation products sold exclusively at The Home Depot. [2]
A Ziehl–Neelsen stain is an acid-fast stain used to stain species of Mycobacterium tuberculosis that do not stain with the standard laboratory staining procedures such as Gram staining. This stain is performed through the use of both red coloured carbol fuchsin that stains the bacteria and a counter stain such as methylene blue .
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