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Common Turpentine Varnish

This is merely clear pale resin dissolved in may be rendered paler by charcoal. (Beasley.) spirits, and 1/4 part oil of turpentine are added, (See No. 1723, &c.) In the preparation of and, after shaking the mixture and letting it spirit varnishes, care should be taken to pre- stand for a few hours longer, a thoroughly , a thoroughly vent the evaporation of the alcohol as much as possible, and also to preserve the portion that evaporates. On the small scale, spirit varnishes are best made by maceration in oil of turpentine; usually 5 pounds resin to 7 close bottles. In order to prevent the agglu- pounds of turpentine. tination of the resin, it is often advantageously