I'm still working on the summary because I want to present the formulas for those who don't have Haist. But as quick start - @ Mr Bill: Yes the first Q was one of mine too. I reasoned it was to maintain approximately the same pH (as particularly in the acutance formulas without the addition of metaborate some of the formulas would have had extremely low activity. But I was hoping they listed the resulting pH values in the original paper as they are not in Haist. I have other questions on this because some of the resultant developing times seem odd.
Another thing - if one really wanted to isolate the effects of sulfite and metol concentrations, would it not have been better to change only one variable at a time? For example, if you keep the concentration of Metol constant and vary the sulfite concentration, if you adjust the pH to maintain activity, you are only testing for the effect of the amount of sulfite. If one then kept the sulfite concentration constant and varied the pH, you could test for increased solvent activity in relation to developing time. Etc.
I was ok with the Gamma targetting, even with the small variations.
I have some more questions regarding the methodology, and then would like to highlight some of the rather surprising results.
Will get this posted today.
Last edited by Michael R 1974; 12-19-2012 at 07:27 AM. Click to view previous post history.