Here in the land of weird RA4 printing disasters, I am having difficulty with Kodak Ektacolor RA4 RT/LU chemistry in a Nova vertical slot processor. I'm using 1 minute develop and bleach/fix times at 33C with Fuji Crystal Archive paper and have tried with and without an Ilfostop citric acid indicator stop bath. I've used Tetenal and Fuji Hunt chems before, typically with good results, so I have got some experience of colour printing. In all of the following cases, the staining/colour cast occurs on the print and the borders. Initially, the prints looked as though the base colour of the paper hadn't been removed - the prints had such a strong cyan cast that they looked like an inkjet print on the undeveloped paper (if you see what I mean). This cleared with later prints but there was still cyan staining particularly on the bottom edge of the paper (they are developed vertically in the slot processor). Then I went through a phase of getting prints that looked quite good in the top half but with faint cyan staining on the bottom half, increasing with strength towards the bottom of the sheet. Now I have prints that have a pale green cast all over and look rather thin - the sort of thing one would expect from under-exposure or under-development. But rather extraordinarily, I did get one print with pure white borders that looked perfect. I've done about 40 10x8 sheets in total. Does anyone have any idea what is causing this, or what I should try next? I guess the obvious thing is just to mix up some more, but I don't want to make the same mistake twice. Can the chemicals have gone off already - bought about a month ago? Were they bad to start with? Didn't I mix them properly? I'm running out of ideas. Thanks for any help or advice.