Re: Tri-X speed. It is indeed ei 250 in a fine grain developer like microdol-x but it is closer to 320 in d-76. As far as Ilford vs Kodak, I prefer Ilford btw I'm getting an ei of 320 with delta 400 as well. Perhaps it's my equipment.AT any rate before I started using delta 400, tri-x was my film.(posted 8762 days ago)