Quote Originally Posted by Photo Engineer View Post
This is where you are wrong. You equate this to swell, wash time and charge. Charge does go down as pH goes up, but swell goes down as does diffusion.

Photography is full of chemistry, and the best I can say is that there is a lot of bad or approximate information out there.

I did not equate anything relating to the isoelectric point with swell. The discussion in Haist specifically regarding the isoelectric point has to do with charge influencing the retention of thiosulfate and silver thiosulfate ions, in relation to washing. I cited this clearly.

All I was saying (with references) was that there appear to be various mechanisms and variables involved, and that they do not all necessarily move in the same direction.