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Note: This formula was obtained from the original patent document which lists two separate versions, A and B. It is unclear as to which formula was used for the commercial version sold under the brand name Perfection XR-1.

  

XR-1 (Formula A)

Speed increasing low contrast fine grain film developer

Distilled Water750 ml
Phenidone1.5 g
Hydroquinone0.5 g
Metol0.25 g
Sodium Sulfite (anhydrous)30 g
Borax (granular)0.75 g
Distilled Water to make1L

Mixing instructions: Add chemicals in specified sequence.

Dilution: Stock, 1+1 (Fast film), 1+3 (Medium speed film), 1+9 (Slow film), 1+2 (Kodak HIE), 1+7, 1+22 (Technical Pan)

Starting point development time: 12-20 mins. (86F/30C)

XR-1 (Formula B)

Speed increasing low contrast fine grain film developer

Distilled Water750 ml
Phenidone1.75 g
Hydroquinone0.25 g
Metol0.25 g
Sodium Sulfite (anhydrous)30 g
Borax (granular)0.50 g
Distilled Water to make1L

Mixing instructions: Add chemicals in specified sequence.

Dilution: Stock, 1+1 (Fast film), 1+3 (Medium speed film), 1+9 (Slow film), 1+2 (Kodak HIE), 1+7, 1+22 (Technical Pan)

Starting point development time: 12-20 mins. (86F/30C)