CHAPTER II. THE WET COLLODION PROCESS.
THE COLLODION. | ||
|---|---|---|
| Alcohol | 30 | ounces. |
| Ether | 40 | ounces. |
| Schering’s Celloidin* | 1 1⁄2 | cakes. |
* Hance’s D. C. gun-cotton may be used instead of the celloidin.
Cut the celloidin into thin strips, or, if it be hard, break it up in a clean mortar, and dissolve in the above mixture of alcohol and ether. When dissolved, this forms the collodion.
THE IODIZER
is composed of:
| Bromide of Zinc | 150 | grains. |
| Iodide of Zinc | 350 | grains. |
| Alcohol | 10 | ounces. |
When the salts are dissolved, filter and add to the collodion.
The filtering is best done by placing a pledget of cotton-wool in the neck of a glass funnel and passing the iodizer through it. To prevent evaporation, lay a glass plate over the funnel.
The iodizer being added to the collodion, shake them up thoroughly and allow to stand for a week to settle, then decant into convenient bottles; this collodion is ready for use in a week, but will improve with age up to six months, after which time it should be mixed with new.