On Mar 10, 2016, at 9:45 AM, Claas Bickeböller <lists@bickeboeller.name> wrote:
Aside from actual shadows, is there any significant variation in color?
shadows darken a sample and as color is 3-dimensional I don’t get your point.
Sorry; I could have been a bit clearer. I mean cases where a fold of the fabric is directly casting a shadow on another portion of the fabric, causing no light at all to reach the shadowed portion. Yes, of course; the shadows cast by a thread on a neighboring thread in a flat sample are the biggest problem -- and that's what I'm suggesting can be reasonably eyeballed. If you've got a not-flat sample and you see significant variation in color, a typical inexpensive consumer-level print spectrometer is not going to have the right geometry to measure it. b&