In some previous classes, I've had to use Tri-X 400 for almost every assignment, and as the classes go, we've had to use D-76. I've tested the combination with several different temperatures and times. The best one yet is D-76/water 1:1 at 68 degrees for 10 minutes, agitating for 5 seconds (invert 4 times) every 30 seconds. Hope it helps!(posted 8335 days ago)