Some time ago I wrote in Photo Techniques about "perverting" HC110 by adding ascorbic acid and carbonate. At that time I had not thought of Glycol or TEA. My latest experiment is the following: 750 ml TEA 32 g ascorbic or erythorbic acid Heat until dissolved Add 250 ml of HC110 concentrate. This mixture is a concentrate. It seems to be a pretty "hot" developer at 1+50 dilution with water. 8 minutes or so at 70 F will get about normal contrast with HP5+.