What's the least concentration of Selenium one one can use, and still make a print archival?
I've come to decide that I don't care for the color of prints made with Ilford Fiber Warm Tone paper when toned 1 minute in selenium mixed 1:20 with water. Yet, selenium toned prints are more archival.
At the very least, as A.A. recommends in his books, I can do a 2nd Fix, put it in Hypo Clearing Agent for 3 minutes, and wash for 1 hour. But, it would be nice to do a little "invisible" toning as well for the archival improvement.
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