Want a softer soup with less "snap & sizzle" than Ansco 130? The following has the same effect as Ansco 120, but with the longevity and unique qualities of a Glycin developer, it's what I call:
12/15 Developer
Hot tap water................................750 ml
Metol...........................................12 grams
Sodium Sulfite (anhydrous)...............36 grams
Sodium Carbonate (anhydrous)..........30 grams
Potasium Bromide (10% solution)........15 cc
Glycin............................................15 grams
Water to make.................................1 litre
I also add 15 ml Benzotriazole in a 2% solution to 1 litre of stock solution.
A good starting point would be to dilute 1:3 and develop for 3 minutes @ 72 degrees. Don't be dismayed when nothing appears on the paper for almost a full minute, and looks like a piece of mushy crap at 2 minutes...that's when the magic starts to happen
I've read that glycin print developers are unique in that increasing a prints development time has minimal effect on the light print values, while lowering the dark values; 12/15 does this for sure. While it does match Ansco 120, it is capable of deep, deep blacks.
I keep my stock and working solutions in aluminized plastic wine bags, the kind with the removable brown spigot. The stock solution is good for at least a year, and the working solution keeps going for month after month after month...although I don't get in the darkroom to print very often
I think commercial makers of developers stopped using Glycin
because it lasts so long. They would rather you use their product once and discard (then of course you'd have to buy more) than keep using it for months on end!!!
Murray