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Hypercat Film Developer

Hypercat was developed by Jay DeFehr as a high acutance, catechol-based tanning/staining developer. Mixed in glycol, it has a long shelf life.

 

 

Hypercat A

Ascorbic Acid 1 g
Catechol 10 g
Propylene Glycol 100 ml

 

Hypercat B

Distilled water 750 ml
Sodium Carbonate 200g
Distilled water to make 1 L

 

People dilute this developer from 1:1:100 to 1:1:500.

You can learn more from Jay’s Hypercat forum.

 

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