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Ammonia fuming is a wood finishing process that darkens wood and brings out the grain pattern. It consists of exposing the wood to fumes from a strong aqueous solution of ammonium hydroxide which reacts with the tannins in the wood. The process works best on white oak because of the high tannin content of this wood.
Different wood species stain differently—the overall colour and shade is a result of a combination of the stain and properties of the wood. For example, although medium-to-dark stains tend to look blotchy on maple, they get deeper and more glowing on cherry, with a more consistent colouration. [3]
In furniture-making, ammonia fuming was traditionally used to darken or stain wood containing tannic acid. After being sealed inside a container with the wood, fumes from the ammonia solution react with the tannic acid and iron salts naturally found in wood, creating a rich, dark stained look to the wood.
Chemical staining of wood is rarely carried out because it is easier to colour wood using dye or pigmented stain, however, ammonia fuming is a chemical staining method that is still occasionally used to darken woods such as oak that contain a lot of tannins. Staining of wood is difficult to control because some parts of the wood absorb more ...
For stubborn stains or mildew spots, hold the wet eraser on the spot for 10-15 seconds before wiping. Rinse each section with a garden hose or clean wet cloth as you go. Allow the furniture to air ...
At the center of a sunburst-finished surface is an area of lighter color (often showing the wood grain underneath) that darkens gradually towards the edges before hitting a dark rim. Among the best known examples of a sunburst finish are the Gibson Les Paul guitars and the Fender Stratocaster .