Page:Cyclopedia of Painting-Armstrong, George D (1908).djvu/30

22 A Brush made for Paint should not be used in varnish, the spirit of which dissolves the cement with which it is set, and loosens the bristles. When a ground brush has been well worn down in color, it may be used in varnish.

Varnish Brushes when not in use should be suspended in either varnish or oil, the brush not resting on the bristles. No brushes should on any account be kept in turpentine.

Stippling Brushes should be well cleaned and dried after use, the bristle being carefully kept from crushing; a box in which they can be slid, allowing the bristle to hang downwards is recommended.

Should a Brush become quite hard with Paint it should be soaked for twenty-four hours in raw linseed oil, after which time in hot turpentine.

Cleaning Paint Brushes. All brushes, after being used, should be carefully cleaned. This is best effected by immersing the hair of the brushes in a little raw linseed oil, the oil should afterwards be washed out with soap and warm water, till the froth which is made by rubbing the brushes on the palm of the hand is perfectly colorless. The brushes should next be rinsed in clean water, and the water pressed out by a clean towel. The hair should then be laid straight and smooth, and each brush restored to its proper shape, by passing it between the finger and thumb, before it is left to dry. Care should be taken not to break the hair by too violent rubbing, as that would render the brushes useless. Many painters use turpentine instead of linseed oil in the cleaning of brushes, it effects the object more quickly, but the only use of turpentine that should be permitted is to rinse the brushes in it slightly when it is required to clean them quickly, but on no account should they be permitted to remain soaking in turpentine, as this practice is certain to injure the brushes, rendering the hair harsh and intractable, and frequently dissolving the cement by which the hair is held in the socket of the handle.