Ian, I am wondering about the Benzotriazole solution (1%) in the PQ Developer - is this a 1% solution in water, or a type of alcohol? I have heard that BZT is difficult to dissolve in water. Also, is it added at the time of working dilution, or during the initial mix? And is it needed at all to produce cool tones? Finally, what are the shelf lives of the two dilutions of PQ that you have listed?
Sorry for so many questions at once.