Response to Speedibrews Celer Reverser ?

Here is a response I received from Ed Inman. Reversal processing is not for the faint-hearted. Be very careful with these chemicals:

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.

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