Quick question: Is a stop bath between dev and blix essential with RA-4 in a slot tank (nova) when working at 35 C with 2 litres of chems? The reason I ask is that I have started to get less than white (tending to be very light green) boarders on my prints, when the boarders should be white! I am wondering if a normal strength stop bath would do this? All chems / papers are fresh and the darkroom is light safe, and I do not use a safe light. Any thoughts would be most welcome, Neil.