From Fred's description, it sounds like Harvey's 777 has a lot of glycin, in addition to PPD. If you add enough glycin to a formula, it will form a cloudy suspension that will not dissolve no matter how much you stir it nor how long you let it sit. Left to sit, the suspension will eventually settle out clear with a layer of fine sediment. Also, glycin is a softworking, fine grained developer component which yields a unique glow to prints. So I'm sure this is one of the components.(posted 8234 days ago)Anyway, this sure sounds like some magic soup. I'd love to try it!