Dupont 7-D

Lith film and paper developer

Water 90F/32C500ml
Sodium Sulfite (anhydrous)60g
Paraformaldehyde15g
Potassium Metabisulfite5g
Boric Acid (granular)15g
Hydroquinone45g
Potassium Bromide3g
Cold water to make1000ml
Mixing Instructions: Add chemicals in specified sequence. This developer oxidizes quickly so mix directly into storage container if possible.
Dilution: 1+1
Usage: Starting point dev time: 2 mins.

Notes 

Discard working solution after 45 minutes.