| A. | ||
|---|---|---|
| Metric Weight. | Avoirdupois Weight. | |
| 600 c.c.m | Distilled Water | 20 ounces |
| 120 grammes | Sulphite of Soda Crystals | 4 ounces |
| 22 grammes | Eikonogen | 330 grains |
| 10½ grammes | Hydrochinon | 160 grains |
| 960 c.c.m | Water to make up to | 32 ounces |
| B. | ||
| Metric Weight. | Avoirdupois Weight. | |
| 600 c.c.m | Distilled Water | 20 ounces |
| 60 grammes | Carbonate of Potash | 2 ounces |
| 60 grammes | Carbonate Soda Crystals | 2 ounces |
| 960 c.c.m | Water to make up to | 32 ounces |
For use take 1 ounce (30 c.c.) of A, ¾ ounce (25 c.c.) of B, with 4 ounces (120 c.c.) of water.
More of A will increase density, more of B will increase detail and softness. Temperature of developer should not vary much below 65 deg. nor above 75 deg. The after treatment is same as with any other developer.
Let the development continue until the blacks look quite strong, and detail showing in the high-lights; wash off developer, then immerse in
Carbutt's New Acid Fixing and Clearing Bath.
| 4 c.c.m | Sulphuric Acid | 1 drachm |
| 480 grammes | Hyposulphite of Soda | 16 ounces |
| 60 grammes | Sulphite of Soda | 2 ounces |
| 30 grammes | [D]Chrome Alum | 1 ounce |
| 1920 c.c.m | Warm Water | 64 ounces |
Dissolve the hyposulphite of soda in 48 ounces (1440 c.c.m.) of water, the sulphite of soda in 6 ounces (180 c.c.m.) of water; mix the sulphuric acid with two ounces (60 c.c.m.) of water, and pour slowly into the sulphite soda solution, and add to the hyposulphite; then dissolve the chrome alum in 8 ounces (240 c.c.m.) of water and add to the bulk of solution, and the bath is ready. This fixing bath will not discolor until after long usage, and both clears up the shadows of the negative and hardens the film at the same time.
Let remain two or three minutes after transparency is cleared of all appearance of silver bromide. Then wash in running water for not less than half an hour to free from any trace of hypo solution. Swab the surface with wad of wet cotton, rinse, and place in rack to dry spontaneously. Then varnish with plain collodion.