Rodinal for prints?

[Paddy]

This has also been discussed on Michael Smith and Paula Chamlee's site, in the "printing" forum.

[gainer]

Rebellion, of course.

[gainer]

Let me remind you of this easy formula for Rodinal. All ingredients may be purchased from Photographer's Formulary.

Add 150 grams of Potassium Sulfite to 400 ml water and stir until it dissolves. Add 37.5 grams of p-aminophenol base. It will not dissolve. Add 20 grams of potassium hydroxide while stirring. All or most of the precipitate should dissolve. Add water to make 500 ml. Use as Rodinal.

If you use the p-aminophenol.HCl instead of the base, you will have to 50 grams of it and twice the amount of Potassium Hydroxide. You will see that the p-aminophenol.HCl dissolves, but precipitates when you begin to add
the hydroxide. It is forming Potassium Chloride and p-aminophenol base which will dissolve as you add more Potassium Hydroxide. You will wind up with some Potassium Chloride in the solution. It is a very weak restrainer, so should have no noticable effect on photographic results.
Now, if you want to make, say, 2 liters of Rodinal for prints from 1/2 liter of stock, you could simply mix it directly for the above recipe using 4 times as much water.

I suspect the working solution would last longer if a few grams of ascorbic acid were added.

[marcsv]

I dont use rodinal (since its not available in my country) but i use the acetaminophen developer (p-aminiphenol extracted from acetaminophen). The tell my they are almost similar. since its cheaper to make, I use it for both film and paper. I dilute it at 1:10 or 1:20, it acts as a warm-tone developer on generic chinese (lucky and shanghai)photo paper and Ilford MGIV and gives neutral tones on polymax. I almost exclusively use it for paper because its the only one around when i need to make prints


Generic chinese paper (scanned print)


Generic chinese paper (scanned print)


Kodak Polymax (scanned print)

[Murray@uptowngallery]

thanks, all.

[dancqu]

Originally Posted by Murray@uptowngallery

... works for both neg/paper but I already have
all the other stuff around the house. Thanks

Film developer for paper equals paper developer for film.
Well almost. As has been pointed out film developer can
run longer on sodium sulfite than may be good for a paper
developer. So, if a lower sulfite higher accutance film
developer is needed start with an appropriate paper
developer. Ansco 120/Beer's A is a good starting
point. A 1:3:3 ratio metol-sulfite-carbonate
blend of Beutler character. Dan