Has anyone used regular photo fixer to fix these? I was screwing around last night, and you get the same darkening (actually, a lot more of it... to the point of making all-brown prints). Any obvious downside? Seems like it will need a lot of dilution (or a lot less exposure). Over the weekend, I am going to mix up some gold toner and the (correct) Van Dyke fixer. My experiments last week seemed to indicate that dropping the dilution to 2% solved the bleaching issue.