I've been researching these chems a bit. According to the documentation I've found on kodak's website it needs 2750ml/m2 of the first and color developer, and 1650 ml/m2. So, the question is; how large is a single roll of 120 film? Anyone know exactly of hand? My guess is about 0.04 m2 (10 * 0.07 * 0.06). That means that you can get away with about 125ml of first and color developer per roll, which gives you 8 rolls per liter and 40 rolls from a 5l kit. Can someone confirm these numbers?