Dupont 7-D

Lith film and paper developer

Water, 90F/32C500 ml
Sodium Sulfite (anhydrous)60 g
Paraformaldehyde15 g
Potassium Metabisulfite5 g
Boric Acid (granular)15 g
Hydroquinone45 g
Potassium Bromide3 g
Cold water to make1L

Mixing instructions: Add chemicals in specified sequence. This developer oxidizes quickly, so mix directly into storage container if possible

Dilution: 1+1

Starting point development time: 2 mins.

Notes: Discard working solution after 45 minutes.