I mixed my first batch of Pyrocat HD yesterday, using the powder kit from Photographers Formulary. The contents of the bag for the B solution were not homogeneous, it contained pure white crystals, but there were also some roundish granules near the top, dirty yellow , I assumed maybe there was a bit of moisture in the bag that caused this. But when I mixed the solution it went muddy green. From my googling around today, it would seem solution B is meant to be clear. I did use the same mixing glass beaker as for A, but I did wash it really thoroughly between A and B; perhaps not thoroughly enough. My question is whether if this is caused by contamination with A it makes B unusable? I was looking forward to trying it out at the weekend, but it will be at least a week before I can get my hands on some potassium carbonate to mix a fresh solution B.