In the course of some other research, I was reminded of the article linked below, Mysteries of the Vortex, which many here have read. I thought I would pass it along afresh to others.

While explaining the chemistry of fixer removal, mostly in layman's terms, and dealing in detail with archival washing in various print washers, it offers very useful information regarding diffusion of fixer out of prints and the value of washing aids. For those of us without expensive and bulky archival washers, and those concerned or obliged to limit water use, it's a great reference.

http://www.film-and-darkroom-user.or...read.php?t=296