| I.— | Glue | 3 ounces |
|---|---|---|
| Gelatin | 3 ounces | |
| Acetic acid | 4 ounces | |
| Water | 2 ounces | |
| Alum | 30 grains | |
| Heat together for 6 hours, skim, and add: | ||
| II.— | Alcohol | 1 fluid ounce |
| Brown glue, No. 2. | 2 pounds | |
| Sodium carbonate | 11 ounces | |
| Water | 3 1/2 pints | |
| Oil of clove | 160 minims | |
Dissolve the soda in the water, pour the solution over the dry glue, let stand over night or till thoroughly soaked and swelled, then heat carefully on a water bath until dissolved. When nearly cold stir in the oil of cloves.
By using white glue, a finer article, fit for fancy work, may be made.
III.—Dissolve by heating 60 parts of borax in 420 parts of water, add 480 parts dextrin (pale yellow) and 50 parts of glucose and heat carefully with continued stirring, to complete solution; replace the evaporated water and pour through flannel.
The glue made in this way remains clear quite a long time, and possesses great adhesive power; it also dries very quickly, but upon careless and extended heating above 90° C. (194° F.), it is apt to turn brown and brittle.
IV.—Pour 50 parts of warm (not hot) water over 50 parts of Cologne glue and allow to soak over night. Next day the swelled glue is dissolved with moderate heat, and if still too thick, a little more water is added. When this is done, add from 2 1/2 to 3 parts of crude nitric acid, stir well, and fill the liquid glue in well-corked bottles. This is a good liquid steam glue.
V.—Soak 1 pound of good glue in a quart of water for a few hours, then melt the glue by heating it, together with the unabsorbed water, then stir in 1/4 pound dry white lead, and when that is well mixed pour in 4 fluidounces of alcohol and continue the boiling 5 minutes longer.
VI.—Soak 1 pound of good glue in 1 1/2 pints of cold water for 5 hours, then add 3 ounces of zinc sulphate and 2 fluidounces of hydrochloric acid, and keep the mixture heated for 10 or 12 hours at 175° to 190° F. The glue remains liquid and may be used for sticking a variety of materials.
VII.—A very inexpensive liquid glue may be prepared by first soaking and then dissolving gelatin in twice its own weight of water at a very gentle heat; then add glacial acetic acid in weight equal to the weight of the dry gelatin. It should be remembered, however, that all acid glues are not generally applicable.
| VIII.— | Glue | 200 parts |
|---|---|---|
| Dilute acetic acid | 400 parts | |
| Dissolve by the aid of heat and add: | ||
| Alcohol | 25 parts | |
| Alum | 5 parts | |
| IX.— | Glue | 5 parts |
| Calcium chloride | 1 part | |
| Water | 1 part | |
| X.— | Sugar of lead | 1 1/2 drachms |
| Alum | 1 1/2 drachms | |
| Gum arabic | 2 1/2 drachms | |
| Wheat flour | 1 av. lb. | |
| Water, q. s. | ||