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> Unnamed pyro formula |
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Unnamed pyro formula
A formula from Czechoslovak book "Škola fotografie pre začiatočníkov" (A beginner's handbook of photography) published in 1970 (I believe, mine is from '78 as 4th edition).
I don't know anything but basics about pryro devs, but from little that I researched I didn't find this formula anywhere else Pyrocatechol.........................5g Metol.....................................5g Sodium carbonate (anh.).....40g Sodium sulfite (anh.)............40g Water to 1l Recommended times with 1+4 dilution at 18°C 10-13°DIN (ISO 4-16).......5 min 15-18°DIN (ISO 25-50).....7 min 19-21°DIN (ISO 64-100)...10 min Book states compensating effect and fine grain. Any thoughts? |
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