Quote Originally Posted by Kycoo View Post
The Freestyle development chart gives 6.5min for Ilford DDX 1+4, 20C for the Arista Premium 400. I believe Ilford gives a time of 8 min for DDX 1+4, 20C for Tri-X.

Is this possibly just a typo or the Arista Premium 400 is not exactly Tri-X?
My bet is plain old human error. Possibly "further experiments," but not likely. I really doubt if FS went through every 400 Premium film with every developer and ran their own tests.

Remember the recent conversation on the formula for ID-78??, the warmtone version of 62? An error many years ago still gets handed down as fact.