GLUE
(Formulas for Glues and methods of manufacturing Glue will be found under Adhesives.)
Rendering Glue Insoluble In Water.
To Bleach Glue.
Method Of Purifying Glue.
The viscous matter is washed, then dissolved in hot water, and allowed to cool, a quantity of weak alcohol acidulated by 1 per cent of hydrochloric acid being added just before the mass solidifies. From 2 to 3 parts, by volume, of strong alcohol (methyl or ethyl) are then added and the solution filtered, charcoal being used if necessary. The glue is finally precipitated from this solution by neutralizing with ammonia and washing with alcohol or water.
To Distinguish Glue And Other Adhesive Agents.
GLUE CLARIFIER: See Gelatin.