Off the top of my head I don't recall how the quantities compare, but FX-2 has basically the same ingredients as 130--glycin and metol, activated by potassium carbonate.(posted 8172 days ago)On the other side of the coin, I found myself with a considerable amount of aging FX-2 some time ago. I had switched to other developers that employ catechol or pyro, so I knew I'd probably never find a use for the FX-2 I had. I figured it might work as a paper developer. So I used it 1(a+b):2 with water and it did an excellent job as a paper developer.