[CHAPTER II.]
FORMULÆ FOR SOLUTIONS REQUIRED IN THE COLLODION PROCESS.
Section I.—Solutions for direct Positives.
Section II.—Solutions for Negative Photographs.
SECTION I.
Formulæ for Solutions for direct Positives.
The solutions are taken in the following order;—The Collodion.—The Nitrate Bath.—Developing fluids.—Fixing liquids.—Whitening solution.
THE COLLODION.
Formula No. 1.
| Purified Ether, sp. gr. ·720 | 5 | fluid drachms. |
| Purified Alcohol, sp. gr. ·825 | 3 | " " |
| Pyroxyline | 3 to 5 | grains. |
| Pure Iodide of Cadmium or Ammonium | 4 | grains. |