Don,

At 1:20 the new grade 2 Azo shows no change in tone after 5 minutes of toning. The old & new grade 3 tones very readily. I got somewhat of a split toned effect after 2 minutes. After 5 minutes the picture was quite brown. But more of a chocolate brown. I have some 40 year old Azo, and I'll try it next time I print.