Warm Tone Pyro Developer for Paper

[Kino]

Kino submitted a new resource:

(there was a url link here which no longer exists) - Warm Tone Pyro Developer for Paper

(circa 1947 -- use at your own risk)

Solution A

Potassium Metabisulphite 5 grams
Pyro 22 grams
Potassium Bromide 15 grams
Water 1000 cc

Solution B
Sodium Sulphite 87.5 grams
Sodium Carbonate 87.5 grams
Water 1000 cc

For use, mix 10 parts Solution A to 20 parts Solution B with 70 parts water.

The image appears in from 30 to 40 seconds and development is complete in 3 or 4 mintues. The prints then should be fixed in an acid fixing bath with intermediate washing.

(there was a url link here which no longer exists)

 

[Sean]

Comments from previous article system:

By toddstew - 02:14 PM, 03-29-2006 Edit Rating: None
I develop my filmwith pyro, but I've never tried paper developed with it, and was wondering what it does with paper. In other words, why use pyro?
By Kino - 02:41 PM, 03-29-2006 Edit Rating: None
As I understand it, it imparts a warm tone to the paper. Don't know for sure, haven't ever tried it. The book dates from 1949 and the formulas often from WAY before that, so who knows? Maybe I'll get a chance to try it some day...
By toddstew - 02:36 PM, 03-30-2006 Edit Rating: None
I'd like to know how it works out for you. Maybe you could compare it with other paper developers you have used.
Todd
By Tom Hoskinson - 04:38 AM, 04-01-2006 Edit Rating: None
This Warm Tone Pyro formula can also be found on page 160 of Photographic Facts and Formulas (by E.J. Wall, F.C.S., F.R.P.S. and Franklin I. Jordan, F.R.P.S.) 1940 Edition, Copyright 1924, 1940 by American Photographic Publishing Co.

Published in 1940 by the American Photographic Publishing Co. Boston

Regarding warm tone paper developers, Wall and Jordan state: "Paraminophenol is usually used in proprietary form (Rodinal, etc.) it has the advantage of keeping indefinitely in stock solution, and exceptionally well when diluted for use. The tone of the prints can be quite materially changed by differences of dilution and by adding bromide."

"Warm tones can be secured by pyro, although not so conveniently as by the modified metol-hydroquinone developers which have generally superseded it for this purpose.