Comments from the previous article system:
By Tom Hoskinson - 11:26 PM, 04-15-2006 Edit Rating: None
Kodelon is p-aminophenol oxalate Other forms of p-aminophenol should work as well. See Pat Gainer's Apug posts on this subject.
By Gerald Koch - 03:17 PM, 04-19-2006 Edit Rating: None
Kodelon was paraminophenol hemioxalate so some adjustment would have to be made for the difference in molecular weights if you substitute pap or pap.HCl. The mol wts of pap, hydrochloric and oxalic acids are 109.1, 36.46, and 126.7 respectively
By Tom Hoskinson - 05:11 PM, 04-19-2006 Edit Rating: None
Thanks for the additional information, Gerald. Can you supply your source?
By gainer - 02:30 AM, 04-20-2006 Edit Rating: None
I'm not familiar with the hemioxalate salt. If it was used simply to make the p-aminophenol more solubile in water, the p-aminophenol base will probably be a little more active for the same weight than either the hydrochloride or the oxalate. I would imagine the character of the developer would be similar in any case. The base may not dissolve completely until after the Kodalk and sulfite are added.
It's reminiscent of DK-50, is it not?
By Tom Hoskinson - 03:53 AM, 04-20-2006 Edit Rating: None
Yes Pat, Very reminiscent of DK-50, and of DK 60-a as well ...
(there was a url link here which no longer exists)
By Tom Hoskinson - 11:52 PM, 04-21-2006 Edit Rating: None
Ansco/Agfa (GAF) 48M and 17M are very similar to Kodak DK-50 and Kodak DK 60-a
By nworth - 01:56 AM, 04-22-2006 Edit Rating: None
The description seems similar to the old Kodak Versatol. Are the two related?
By Tom Hoskinson - 06:41 AM, 04-23-2006 Edit Rating: None
nworth, the evidence I have indicates to me that Versatol is indeed related to Kodak Universal M-Q Developer, DK-50, DK 60a, D-72 and similar Kodak M-Q developers. The third edition of the Kodak Data Book on Formulas and Processing (1946) lists Kodak Versatol as Concentrated liquid universal developer for film, plates and papers. No formula is given for Versatol. Kodak Universal M-Q Developer is described as Convenient packet developer developer for film, plates and papers. No Formula is given for Kodak Universal M-Q Developer.
By Tom Hoskinson - 06:54 AM, 04-23-2006 Edit Rating: None
I have found the answer to my question about Kodelon in my own personal library. Elementary Photographic Chemistry, Eastman Kodak Company, Rochester, N.Y., 1928: States on Page 18: Para-AMINOPHENOL OXALATE is manufactured and sold by the Eastman Kodak Company under the name of Kodelon.
By Gerald Koch - 03:08 PM, 04-24-2006 Edit Rating: None
Kodak Universal MQ is what was supplied in Kodak's Tri-Chem Pack.
