Aminophenol + Ascorbic Acid developer?

[olk]

Hi,
is there a receipt of p-Aminophenol + Ascorbic Acid Developer known?
Oliver

 

[koraks]

is there a receipt of p-Aminophenol + Ascorbic Acid Developer known?

Not sure, but read this thread, particularly the post linked to here and the two preceding it: https://www.photrio.com/forum/threads/superadditivity-in-developers-and-beyond.28338/post-396785
These developers apparently form no super-additive pair, so I doubt it's all that useful to try and combine them.

What are you trying to achieve?

 

[Alan Johnson]

Hi,
is there a receipt of p-Aminophenol + Ascorbic Acid Developer known?
Oliver

You may make p-aminophenol from acetaminophen/tylenol first but it is superadditive:

Fine grain developer from Paracetamol/Tylenol

Cars rust faster in salt water than they do in fresh water. Salt is an oxidizing agent, not a reducing agent. Silver halides need to be reduced to metallic silver, so you need a reducing agent, not an oxidizing agent. That's why salt isn't used as a developing agent in silver halide photography.

www.photrio.com

 

[olk]

What are you trying to achieve?

I was curious if such a receipt exist.

 

[olk]

You may make p-aminophenol from acetaminophen/tylenol first but it is superadditive:

Fine grain developer from Paracetamol/Tylenol

Cars rust faster in salt water than they do in fresh water. Salt is an oxidizing agent, not a reducing agent. Silver halides need to be reduced to metallic silver, so you need a reducing agent, not an oxidizing agent. That's why salt isn't used as a developing agent in silver halide photography.

www.photrio.com

Instead of using Paracetamol (acetaminophen/tylenol) would p-Aminophenol HCL work too?

 

[Alan Johnson]

Yes. Gainer did experiments with p-aminophenol base:

Experiments with Metol and ascorbic acid.

gainer submitted a new resource: (there was a url link here which no longer exists) - Experiments with Metol and ascorbic acid. The factors affecting developer activity are temperature, pH, concentration, products of aerial oxidation, products of silver halide reduction, and the orientations...

www.photrio.com

No need to stick to his formula, instead of metaborate you could use sodium carbonate (washing soda) and add some sodium bicarbonate (baking soda) if you find the sodium carbonate alone too active. There never has been a widely used formula for p-aminophenol/ascorbate so you would need to conduct something of an experiment.