| 9. | Ammonium sulphocyanide | 15 | grains. |
| Table salt | 30 | grains. | |
| Hypo | 2 | ounces. | |
| Water | 10 | ounces. |
To this is slowly added one grain of gold chloride in half an ounce of water. The prints first washed for five or ten minutes in running water, and placed in the combined bath and kept moving by being constantly turned over and over for about ten or fifteen minutes. The longer they remain in the bath the more blue and less red will they be when dried.
Here is another bath which finds some stout supporters:—
| 10. | Ammonium sulphocyanide | 20 | grains. |
| Hypo | 1 | ounce. | |
| Alum | 30 | grains. | |
| Water | 10 | ounces. |
Shake well, until thoroughly dissolved, then add
| Lead nitrate | 20 | grains. |
Again shake well and set aside to settle, pour off the clear part, and add
| Gold chloride | 1 | grain. |
dissolved in half an ounce of water.
Others recommend a still more simple bath as follows:—