Hi, I was always puzzled at how Kodak insists in its documentation on the small tank agitation of 5 inversions in 5 seconds every 30 seconds, versus everybody else's 4 inversions in 10 seconds every minute. My conclusion is that Kodak wants to "equalize" development times. What I mean is that given that in time X a certain film/developer combination will fully develop shadows, and given that: - shadows don't change much with agitation - shadows don't change much after they are fully developed - Kodak assumes that people don't want to go into details, they just want to assume that time is directly proportional to contrast then they will recommend: - an official dev time of Y = 2 times X, or maybe Y = 1.5 times X - strong agitation (5 inv/5sec/30 sec) so that an average user will be able to: - change contrast with slight changes in dev time (since highlights dev is maintained quick by the strong agitation). - not run the risk of underdeveloping shadows (since they are already way past shadows dev time) So this simplifies contrast management at the price of sacrificing further refinement in tone management. Does my reasoning make sense?