I have a metric crapload of old D-19, Microdol-X and Dektol powders I acquired with some old darkroom stuff. All powders, in cans and paper bags, been stored right. Mostly from the 1960s. The cans are from the 1950s (have receipts), the bags from the 1970s (I think). I have always used D-76 because . . . . it's D-76 I like it, it works, never had any problems with it. In fact it is all I have ever used. I hate to let it go to waste. What can I expect from these? Words of wisdom and experience from the experts here??