ABSINTHE: See Wines and Liquors.
ACID-PROOFING
An Acid-proof Table Top.—
| 1. | |
|---|---|
| Copper sulphate | 1 part |
| Potassium chlorate | 1 part |
| Water | 8 parts |
| Boil until salts are dissolved. | |
| 2. | |
| Aniline hydrochlorate | 3 parts |
| Water | 20 parts |
| Or, if more readily procurable: | |
| Aniline | 6 parts |
| Hydrochloric acid | 9 parts |
| Water | 50 parts |
By the use of a brush two coats of solution No. 1 are applied while hot; the second coat as soon as the first is dry. Then two coats of solution No. 2, and the wood allowed to dry thoroughly. Later, a coat of raw linseed oil is to be applied, using a cloth instead of a brush, in order to get a thinner coat of the oil.
A writer in the Journal of Applied Microscopy states that he has used this method upon some old laboratory tables which had been finished in the usual way, the wood having been filled oiled, and varnished. After scraping off the varnish down to the wood, the solutions were applied, and the result was very satisfactory.
After some experimentations the formula was modified without materially affecting the cost, and apparently increasing the resistance of the wood to the action of strong acids and alkalies. The modified formula follows:
| 1. | |
|---|---|
| Iron sulphate | 4 parts |
| Copper sulphate | 4 parts |
| Potassium permanganate | 8 parts |
| Water, q. s. | 100 parts |
| 2. | |
| Aniline | 12 parts |
| Hydrochloric acid | 18 parts |
| Water, q. s. | 100 parts |
| Or: | |
| Aniline hydrochlorate | 15 parts |
| Water, q. s. | 100 parts |
Solution No. 2 has not been changed, except to arrange the parts per hundred.
The method of application is the same, except that after solution No. 1 has dried the excess of the solution which has dried upon the surface of the wood is thoroughly rubbed off before the application of solution No. 2. The black color does not appear at once, but usually requires a few hours before becoming ebony black. The linseed oil may be diluted with turpentine without disadvantage, and after a few applications the surface will take on a dull and not displeasing polish. The table tops are easily cleaned by washing with water or suds after a course of work is completed, and the application of another coat of oil puts them in excellent order for another course of work. Strong acids or alkalies when spilled, if soon wiped off, have scarcely a perceptible effect.