I sent some files on a CD to Dwayne's Photo to have "printed" onto slides (to be fair, they files originated on negative film). Looks like they did a decent job - the B&W images I sent look B&W, I didn't notice a color cast when holding them up to the light. There was one frame unmounted (looks like it was to tie the run of photos to my order), and I saw "Kodak EB-3" in the rebate area. What film is this? Obviously an Ektachrome of some type, so they must have a stash of it somewhere that they're not selling but are instead using it for duplicate slides and slides from negatives/CDs?