Читать книгу Henley's Formulas, Recipes and Processes (Applied Chemistry) - Various - Страница 635
To Restore Brushes.
Оглавление—A good remedy to restore lettering brushes which have lost their elasticity and do not keep a point, is as follows:
Put the pencil in oil and brush it several times over a hot iron in such a manner that the hairs touch the iron from each side; then dip the pencil quickly in cold water.
