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510 Pyro

Formulas510 Pyro was developed by Jay DeFehr. It’s a simple developer that keeps indefinitely and can be used at many dilutions – usually 1:100 – 1:500.


Warm triethanolomine (TEA) 75 ml
Ascorbic Acid 5 g
Pyro 10g
Phenidone 0.25 g
Triethanolomine to make 100 ml


I usually make 4 times this amount because it is easier to measure. I buy the pyro premeasured at 100 g, so I don’t have to worry about pyro dust.


For more information and some sample photos, check out Jay’s website for 510 Pyro.

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