Opps! How embarassing, but thanks for pointing out my error. Let me try again. The average 35mm rollfilm tank takes 8 oz. (227ml) of solution for a single roll of film. If you dilute Xtol 1:1, half of the volume (113.5ml) will be developer, so there will be no problem with undercapacity. If you dilute 1:2 however, there will be only 76ml of developer to 151ml of water. That's less than the 100ml minimum, which will lead to underdevelopment.(posted 8988 days ago)In my experience however, negatives developed at 1:1 at Kodak's recommended times do not have the same density as negatives developed in full-strength Xtol, also at Kodak's recommended time (i.e., they're a bit lighter.) Bottom line: run a few tests before you develop an important roll of film.