As others and Graeme have pointed out, a spherical geometry device and/or using a large aperture is the optimum solution here. But given the requirement of using current equipment, you may be able to alleviate some of the issues by printing the same chart multiple times in different orientations (landscape, portrait), different order (random, etc) on the substrate and then average those measurements. Good luck, Rohit On Wed, Mar 9, 2016 at 8:46 AM, Garth Fletcher <garth@jacqcad.com> wrote:
Lorenzo Ridolfi wrote:
I need to profile a textile media for a large format printer
II have no specific experience with the instruments you mention, but I have worked with textiles.
What differentiates textiles from most other media is their strong surface texture. The incident angle of the illumination can have a strong effect on the reading. For example, 45° illumination creates shadow areas behind each raised fiber which will be "seen" by a 0° sensor.
Diffuse illumination may be useful to alleviate that problem.
The above assumes that you are printing on fabric woven with a single weave - the usual case for printing.
Dobby or Jacquard woven fabrics, which contain many different weaves, create a much larger set of problems... -- Garth Fletcher
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