So, in that first session I mixed up 2.2 liters at 1+10 and actually only toned approx ten 30x40cm prints @ 4 mins each - that's not much toning really, is it? The solution was then poured into a concertina'd container for storage... given that I only did about ten prints, the solution in the bottle is probably still good to go for a few more prints yet at 4 mins, would you think? Will it be good to go right out of the bottle like that after a month or two, or three? Maybe I should just put in 100mls of concentrate to get it up to speed.... ? I mean, I don't want to put too much in..... when is too much?!