Mixing Part A with Part B, it's ready to be used, and can be re used more times within two months. It's possible to dilute it 1:1 too, and use it as a one shot solution.The best results are obtained with cubic grain films, such as Ilford HP5 and FP4, Kodak Tri-X, Rollei RPX, Fomapan or Kentmere. It's not recommended with T-Grain films such as Ilford Delta and Kodak T-Max. Quick and easy, ars-imago MB Monobath is an efficient solution to develop and fix B&W films with a single bath. PREPARATION and DEV TIMESStock A+B: Once the Part A has been mixed with Part B in equal measure, you get the working solution that can be reused several times within two months, which is the time in which the development is assured.The recommended dev time is 8 mins with standard agitation of 10 seconds for every minute.Dilution 2+1+1: Mixing the stock solution with the same water quantity you get a diluted solution 1:1 (2 parts of water, 1 part A and 1 part B) that can be used as a one shot solution that has to be disposed of after the use.The recommended developing time is 10 minutes with standard agitation of 10 seconds for every minute. After the developing process the film has to be washed in running water for at least 10 minutes. TEMPERATURE: The temperature does not affect critically the developing process but has to stay within 20-25°C. AGITATION: Continuous for the first 30 seconds, 3-4 inversions (or 10 seconds) every minute for the remaining developing time. CAPACITY/DURATION: You can develop up to 15 films within 2 months with the stock solution. It's possible, though, that capacity and duration are higher. The diluted solution mustbe disposed properly of after the use.