ROCHE'S INTENSIFIER. B.
| Water | 10 oz. |
| Sulphate of Copper | 100 grains. |
| Bromide of Potassium | 100 |
When dissolved, this solution is ready for application and can be used repeatedly.
The negative, after fixing and washing, is immersed in the solution until it turns white. p63
Now remove it and wash slightly, then immerse it in old ferrous oxalate developer and allow it to remain until it becomes black entirely through the film. This method gives fine results and good printing color.
PRACTICALITIES.
Form the habit of noticing carefully the intensity of the illumination of the subject on the ground glass of the camera, so as to judge correctly the time of exposure, as much of the successful working of dry plates depends on the exposure; for although slightly under-exposed or much over-exposed plates may by suitable modification of the developer be saved and print good pictures, yet they will lack the glow and balance that are characteristic of the most perfect work.
Use a flat camel's-hair brush to remove any dust from the plate, before putting it in the shield for exposure.
Always keep your developing solution in motion on the plate.
Fix your negative very thoroughly; leave it in the hypo 5 or 6 minutes longer than it is apparently necessary.