Hi Rohit! One thing not mentioned thus far is to be aware of optical brighteners and potential for fluorescence in inks when printing on textile. Optical brighteners in textile can fluoresce well into the visible range of the spectrum. Additionally, they fluoresce differently than optical brighteners in paper. In this case the excitation illumination in the measuring device is important. Using a measurement device with a light source that spectrally approximates D50 (like the X-rite Exact or the Barbieri SpectroPad) might be important to ensure that you get measurements that are meaningful for color management purposes. Computational M1 measurements (like those of the i1 Pro2) may not be appropriate. Max Derhak (PhD) Principal Scientist ONYX Graphics, INC. 6915 High Tech Drive | Salt Lake City, UT, 84047 | USA DIR +1 801 984-5339 | www.onyxgfx.com -----Original Message----- From: colorsync-users-bounces+max.derhak=onyxgfx.com@lists.apple.com [mailto:colorsync-users-bounces+max.derhak=onyxgfx.com@lists.apple.com] On Behalf Of Rohit Patil Sent: Thursday, March 10, 2016 12:29 PM Cc: colorsync-users@lists.apple.com Subject: Re: Reading textile samples 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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