Hydrquinone Vs Phenidone mixing mistake

SMBooth

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• Mar 26, 2013

• #1

I just mistakenly used Hydrquinone instead of Phenidone when mixing some 510 pyro. Out of interest I developed a FP4+ at 1:100 to see what would result. To my delight the negative come out really nice.
What is the difference between the two?

 

John Wiegerink

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• Mar 26, 2013

• #2

If you mixed 1g of Hydroquinone in place of 1g on Phenidone I don't thing that amount of Hydroquinone would have much if any affect at all. Of course, I could be wrong on that one. JohnW

 

OP

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• Mar 26, 2013

• #3

Well it was 5 gram into 10gram of pyro.

 

OP

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SMBooth

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• Mar 26, 2013

• #4

Sorry it was only .25 gram not the 5 grams (that was Ascorbic Acid) So practically little , if any effect.

 

jochen

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• Mar 27, 2013

• #5

Hello,
Phenidone is commonly used as a replacement for metol. Since it is more active than metol only 1/9 to 1/8 of the metol amount is necessary. Since Phenidone does not answer to bromide as well as metol, usually benzotriazole is necessary as antifog.