D. Glenn Arthur wrote: First, Google for "anomalous reflectance". I've read about the effect on film before, and apparently there are certain fabric/dye combinations that are a real PITA for catalog photography because of it. (Or maybe you don't have to, since you already have a handle on the cause. But I found it interesting reading the last time I dove into the subject.)
Anomalous reflectance sounds right, and it's not a problem with the film or the sensor. A few years ago, I photographed a model wearing a yellowish-green dress, which looked greenish-yellow on film. It might have been the other way around, but the picture certainly didn't look like the fabric. Some shades of purple are difficult for film to reproduce, or at least to print the way our eyes see the color. Digital sensors will have trouble with some parts of the spectrum, too. Human eyes don't even see everything the same, as you notice when you disagree with someone over what color something really is. If your own two eyes match each other, good enough. Pat White
