Here is a response I received from Ed Inman. Reversal processing is not for the faint-hearted. Be very careful with these chemicals:(posted 8862 days ago)You can try the Kodak kit which uses permanganate bleach and a direct blackening redeveloper requiring no re-exposure, or you can use this more traditional procedure which works well with most B&W materials:
SUGGESTED SOLUTION FORMULAS:
FIRST DEVELOPER: Add 9.5 grams of sodium thiosulfate to 1 liter of Kodak D-19 developer regular strength.
BLEACH: To one liter of water add 9.5 grams of Potassium Dichromate and 12 ml of concentrated Sulfuric Acid.
CLEARING BATH: To one liter of water add 90 grams of Sodium Sulfite.
SECOND DEVELOPER: Use straight D-19 or a standard paper developer like Dektol.
FIXER: Use Kodak Rapid Fixer or similar.
HYPO CLEARING AGENT: Use Kodak Hypo Clearing Agent, or similar.
PHOTO-FLO: Use Kodak Photo-Flo or similar.
These solutions can be used to make B&W slides from almost any 35mm B&W film. The recommended starting point times for a standard (non- rewind) tank at 20C (68F) is:
FIRST DEVELOPER: 7 min. RINSE: 2-5 min. (change water frequently) BLEACH: 1-2 min. CLEARING BATH: 2 min. RINSE/RE-EXPOSE (Take film from tank and expose to white light. You can't overexpose at this point) SECOND DEVELOPER: 5 min. RINSE/FIX/DRY normally.
Use of fixer is optional. Film can be washed and dried after second developer but emulsion will remain unhardened.
As a general rule, just remember: If too dark, increase time or temp. of first developer. If too light, decrease time or temp. of first developer.
TO ORDER HARD-TO-FIND CHEMICALS call Photographer's Formulary toll free at 1-800-922-5255. (Note: They only sell sulfuric acid in a 48 percent solution so you will need to use 25ml for a liter of bleach INSTEAD of the 12ml you would use of concentrated solution.)
DISCLAIMER: Potassium Dichromate and Sulfuric Acid are hazardous chemicals which should be treated with extreme care and handled as hazardous waste. If in question, the bleach formula should be made by a qualified chemist.