Pyrocatechin developer

[ferod]

Hello, im new in this forum,i like to work in darkroom, and between the film developer that I have used in past, my preferred ones are: Moersch Finol and Ornano Nucleol BF200.
Now I would want to try to make in house a film developer, i have these formulas, someone it has tried, it knows tell me the dilutions and the just times to them for every one of this developer, the differences in the result?
Thanks to all.

1° Formula
(A) 100ml water + 8g pyrocatechin + 1.25g sodium sulphite anhydrous
(B) 100ml water + 1g sodium hydroxide

2° Formula
(A) 100ml water + 8g pyrocatechin + 1.25 sodium sulphite anhydrous
(B) 100ml acqua + 10g sodium hydroxide


3° Formula
(A) 100ml water + 1.25 pyrocatechin + 8g sodium sulphite anhydrous
(B) 100ml water + 10g sodium hydroxide

 

[keithwms]

This should give you an idea...

http://unblinkingeye.com/Articles/Stain/stain.html'

At least one of your recipes look just like the Windisch compensating one which is used at something like 1:500 dilution. Times, I don't know, but once you have a name for the formula you can google it... it'll probably be 8 mins or so I think.

Welcome to APUG!

 

[keithwms]

P.S. Here are some better time suggestions. Looks like my 8 min guess is a minute or two too short.

 

[Ian Grant]

One warning, all three developers have a very short lifespan once the two parts are mixed together, when the developer solution begins to turn blue/green it will stain the film base.

Ian

 

[ferod]

Thank you, i hope i will be have a nice result.