The development will be practically instantaneous, and care must be taken to avoid air bubbles forming upon the surface of the prints. Place prints, after developing, directly into a clearing bath of muriatic acid, 1 drachm to 12 ounces of water, and let them remain in this bath about 10 minutes, when they are ready for the final washing of 15 minutes in running water, or 5 changes of about 3 minutes each. Lay out between blotters to dry, and mount by attaching the corners.
Bradley Platinum Paper.
A.—For black tones:
| Neutral oxalate potassium | 8 ounces |
| Potassium phosphate | 1 ounce |
| Water | 30 ounces |
B.—For sepia tones:
| Of above mixed solution | 8 ounces |
| Saturated bichloride mercury solution | 1 ounce |
| Citrate soda | 5 grains |
{530}
If deep red tones are desired add to B
| Nitrate uranium | 10 grains |
Then filter and use as a developer.