| Hyposulphite of Soda | 1 lb. |
| Alum | ¼ lb. |
| Water | 1 gal. |
When the soda and alum are dissolved let it stand until all sediment settles to the bottom, then pour off the clear solution and use it to fix until from much use it becomes black and turbid, then make up and use a fresh solution. p58
The plate should be left in the fixing solution for fully five minutes after it appears thoroughly cleared, then take it out and wash until all traces of hypo are removed.
If the plate has not previously been in the alum solution it may now be put in the
CLEARING SOLUTION.
| Alum | ½ lb. |
| Citric Acid | 2 oz. |
| Water | ½ gal. |
Keep this solution in a flat dish, and after the plate has been washed from the hypo put it in this solution for two or three minutes; if there are any remaining traces of hypo in the film it will be decomposed, the film will be hardened and freed from color; when this is accomplished wash again and set the plate up to dry.
While the alkaline pyro developer is the best and gives the finest printing quality to negatives, there are many who prefer (for other reasons) the
FERROUS OXALATE DEVELOPER.
No. 1.