B&W Reversal
This is a formula i found some years ago on the web. I do not know the original author.
I believe this is taken partly from the Formulary's and Ilfords reversal recipe.
These formulas are dangerous in the hands of the inexperienced. Especially Sulphuric acid.
Be careful. I take no responsibility for this.
I have used this formula successfully on Tmax 100 shot at 50. In 35mm and 4x5.
I am now working with Stannous Chloride to eliminate the Re-Exposure step.
I will post a new formula when I figure it all out.
Processing Schedule
First Developer Tmax 100 shot at iso 50, 68F at 10 min.
Rinse 2 minutes
Bleach 2-3 minutes
Rinse 1 minute
Clear Bath 1.5-2 minutes
Rinse 1-2 minutes
Re-exposure 30-60 seconds each side
Second Developer 3-4 minutes
Rinse 30-60 seconds
Fixer Normal time for fixer used
Hypo Clear Normal Time
Wash Appropriate time for fixer used, 5-10 minutes
Photo-flo Wash
Dry
Agitation in the solutions should be 5 seconds of every 30 seconds.
After the bleach step, re-exposure to light renders the remaining silver
developable. The use of stainless steel or clear plastic processing reels
makes it possible to re-expose the film while on the reel. Optimum re-exposure
is about 800 foot-candle seconds, but the amount of re-exposure is not
critical. Both sides of the reel should be exposed for 30-60 seconds to a 60
or 75 watt bulb at 12 to 18 inches. The reel should be rotated constantly
during re-exposure.
Developer to make 250ml
Add to 250ml of D-76
15 Gram Sodium Carbonate Mono-Hydrate
or 12.81 Gram Sodium Carbonate Anhydrous
4 Gram Sodium Thiosulfate Penta-Hydrate
1 Gram Potassium Bromide
Developer to make 1000ml
Add to 1000ml of D-76
60 Gram Sodium Carbonate Mono-Hydrate
or 51.27 Gram Sodium Carbonate Anhydrous
16 Gram Sodium Thiosulfate Penta-Hydrate
4 Gram Potassium Bromide
Bleach
9.5 Grams Potassium Dichromate
12ml Sulfuric Acid 48%
1000ml Water
Clear Bath
50 Grams Sodium Sulfite
1000ml Water
SECOND DEVELOPER
Dektol 1:2
FIXER
Usual film Fixer
