Originally Posted by edgework
The technique that Dan describes in his LAB book isn't as precise as one he used in an earlier version of his Professional Photoshop. I prefer the earlier version.
Set a curve adjustment layer and open the curves. Sample the cast area. Make certain that the curves have the black/white gradient set with black to left, white to right. Whatever value you read for the area sampled is a measure. I think this banner reads something like -1 a and 5 b. Set a midpoint and in the input/output box plug in the sampled value for input and 0 for output. By definition this pulls whatever color you've sampled to dead neutral. Works without much thought at all, which is why i like it.
Good point. Mine was too cyan. Gave it another try. Thanks for the tip. Nice job Dave.