I read a post somewhere recently about some fallacies regarding selenium toning for archival protection. The gist of the article was that the method most of us use: toning in a fairly dilute solution for a fairly short time, and pulling the print before too much color change occurs. According to the author, with this method only a portion of the silver is converted to silver selenide (correct?), so only a portion of the print is truly "archival."
What does anyone else know about this? If I can find the article, I'll post a link.