In a previous post I mentioned how happy I was with Kodak RA-4 chemistry. I decided to try their C-41, and have a couple of questions for those that use the Kodak chemistry. I've been using Tetenal chemistry, which can be reused, increasing the times for each batch. Kodak's literature says to only use it once. can the Kodak be reused like the Tetenal can? Also, I normally buy the Tetenal 5 liter kit and mix one liter at a time. With the Kodak developer, a couple of the ingredients are in very small quantities. Should I mix the entire gallon of developer at once, or carefilly measure out each ingredient and mix part of the gallon? If I mix the entire gallon and put it in several small brown glass bottles, how is the life of the developer? The literature says 6 weeks, but there's a possibility I may not have enough film to develop to use the entire gallon in 6 weeks.