HI. I HAVE USED DD-X ON ILFORD DELTA 400,DELTA 320O AND HAVE GOOD RESULTS WITH BOTH. PUBLISHED TIMES ARE PROBABLY ABOUT CORRECT FOR THE 400 BUT I FOUND THAT THE TIME FOR THE 3200 WAS 1.5 T0 2 MINUTES SLOW FOR MY METHOD OF WORKING DEVELOPING TEMP 20 CENTIGRADE IN TANK WITH CONTINUOS ROTARY AGITATION.(posted 8639 days ago)