November 18th, 2009Compositions and Uses For Lacquers
Author: Allison Ryan
Source: ezinearticles.com
Almost all of the large paint and varnish manufacturers in the United States are now making lacquers, which in some cases are being unwisely advertised as suitable for nearly all purposes. In the hands of a skilled finisher they produce satisfactory effects, but when a novice attempts to spread them with a brush over newly varnished surfaces, there is sure to be trouble because the solvents in the lacquer are similar to those contained in some of the paint and varnish removers and the newly applied coating reacts with the old, resulting in a spoiled finish.
If a varnished or enameled surface is old, hard, and well preserved, a lacquer finish may adhere satisfactorily soon after it is applied. However, checking is apt to occur later on. Lacquer finishes have certain limitations and cannot be used over other finishes indiscriminately with assurance of success. Lacquer finishes have grown in popularity on wood frames, fireplace designs, and designer window toppers and, when used properly by one who understands them and their limitations, they are attractive and durable and possess many good qualities.
Lacquer enamels, which are pigmented lacquers, are successful and popular finishes for automobiles. Lacquers of various kinds are used extensively on metalwork, particularly building-hardware, electric-light fixtures, metal spinning and stamping objects, and often for toys, artwork, and even jewelry. They are also used satisfactorily on high grade furniture. Pigmented lacquers are used on electric light fixtures, novelties, and machinery, and also almost universally on the highest priced automobiles.
Composition of Nitrocellulose Lacquers
Clear or transparent lacquers contain five types of ingredients: