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May & Baker B&W Reversal Processing
| First Developer | ||
| Suprol | 1 + 4 | |
| add Sodium Thiocyanate | 4 g/litre | |
| Bleach Bath | ||
| Potassium Dichromate | 50 g | |
| Sulphuric acid (conc) - see note | 50 ml | ADD THE SULPHURIC ACID DROP BY DROP TO 900ml OF WATERWITH CARE. |
| Water to | 1 litre | |
| Use 1+9 | ||
| Clearing Bath | ||
| Thiolim | 1+ 9 | |
| or | ||
Sodium Sulphite |
50 g | |
| Water to | 1 litre | |
| Second Developer | ||
| Suprol | 1+ 7 | |
| Stop bath | ||
| Acetic Acid | 3% solution | |
| Fixer | ||
| Amfix | 1 + 3 | |
| First Developer | 20°C 12 minutes | |
| Wash | 5 mins | |
| Reversal Bath | 5 minutes | |
| Wash | 1 minute running water | |
| Clearing Bath | 2 minutes | |
| Wash | 1 minutes | |
| Re-exposure | Expose to 100 watt bulb 18inches/0.46 metres for 30 - 60 seconds |
|
| Second Development | 20°C 6 minutes | |
| Wash | 30 scs running water | |
| Fixer | 5 mins | |
| Wash | 10 mins running water | |