jnanian said:i mixed formulary tf-4 with tap water instead of distilled water and got outgassing of ammonia. it is the only chemistry i have had this happen with, and was told that it was the chlorine & other additives in the tapwater. maybe you are having the same problem claire
Loose Gravel said:It seems that at the end of a session of printing or film developing, as I am pouring and rinsing and cleaning up, I often get a whiff of ammonia. What is getting mixed with what to give me this odor?
Maine-iac said:I get this too when I'm mixing Perma-Wash with Selenium Toner. I don't know which chemicals are reacting with which, but it's something in that combination of washing aid with selenium toner.
Ole said:Why on earth do you do that???? Mix your selenium toner with water; your Perma-Wash with water, and keep the two separate!
KRST contains ammonium thiosulfate, BTW...
Maine-iac said:... I'm not adding enough selenium to act as a toner and change the print tone, but only enough to coat the silver particles and add permanence. ...
Ole said:The value of this is questionable, from what I've heard. I think the main effect is to release selenium into the environment, without beneficial effects to the prints.
ann said:i thought i posted this the other day, but
it would b e helpful for you to review the data from the IPI regarding the archival properties of selenium. Based on their recommendations, what you are doing is not adding any permance protection. It is neither cost effective or environmental sound.
Am sorry i don't have the orginal paper source, but check out Tim Rudmans' comments in his book on Toning under the chapter on Archival permanence.
Maine-iac said:Maybe you can teach old dogs new tricks.
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