Folks, I appreciate the suggestion of simply mixing formulas outdoors and I have already been doing exactly that when possible.
Yet, problems with mixing outside I have been constantly facing are unpredictable gusting winds, windblown debris and kamikaze bugs that inevitably find and dive into a half finished formula. Then there are the extremes in temperature like this weeks 106 degree summer day--nor can I mix something up outside in the winter when it's below freezing.
My darkroom is the next best place to prepare these formulas--I certainly don't want to use my kitchen! Are there no better methods or alternatives?