Hello all! I have a question regarding calibration standards. You mention that the X-rite colorChecker passport is convenient as it has a range of grey levels, and it certainly looks both brilliant and affordable. However, looking at the website and user manuals I can’t seem to find any information on the reflectance values of the range of grey standards that are included at the bottom of the classic card. Would you advise calibrating the standards with a spectroradiometer and master standards or are you aware of some other (cheaper) method of obtaining this data? Many thanks!

Grey standards
jolyon Changed status to publish July 8, 2019