Pyro film developer
| Stock Pyro Solution |
| Water | 750 ml |
| Potassium Metabisulfite | 24 g |
| Pyro | 100 g |
| Cold water to make | 1L |
| Working Solution A |
| Stock Pyro Solution (above) | 50 ml |
| Cold water to make | 500 ml |
| Working Solution B |
| Water, 125F/52C | 250 ml |
| Sodium Carbonate (monohydrate*) | 21.6 g |
| Sodium Sulfite (anhydrous) | 25 g |
| Potassium Bromide (10% solution) | 6 ml |
| Cold water to make | 500 ml |
* = 18.5 g Sodium Carbonate (anhydrous)
Mixing instructions: Add chemicals in specified sequence. The 10% solution of potassium bromide can be made by dissolving 10 g of potassium bromide in 1L of water.f
Dilution: Mix 1 part Working Solution A with 1 part Working Solution B for tray use. For tank use, mix 1 part Pyro Stock Solution (not Working Solution A) with 5 parts Working Solution B + 20 parts water.
Starting point development time: 5-10 mins.
