Natural Glue For Cementing Porcelain, Crystal Glass, Etc.
Belt Glue.
Chromium Glue For Wood, Paper, And Cloth.
II.—Use a moderately strong gelatin solution (containing 5 to 10 per cent of dry gelatin), to which about 1 part of acid chromate of potassium in solution is added to every 5 parts of gelatin. This mixture has the property of becoming insoluble by water through the action of sunlight under partial reduction of the chromic acid. {16}
Fireproof Glue.—
| Raw linseed oil | 8 parts |
| Glue or gelatin | 1 part |
| Quicklime | 2 parts |
Soak the glue or gelatin in the oil for 10 to 12 hours, and then melt it by gently heating the oil, and when perfectly fluid stir in the quicklime until the whole mass is homogeneous, then spread out in layers to dry gradually, out of the sun’s rays. For use, reheat the glue in a glue pot in the ordinary way of melting glue.
Cements.
Under this heading will be found only cements for causing one substance to adhere to another. Cements used primarily as fillers, such as dental cements, will be found under Cements, Putties, etc.