Thank you for your clear explanation. Regards, Xavi. -----Original Message----- From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx] On Behalf Of Graeme Gill Sent: Tuesday, October 1, 2013 2:05 AM To: argyllcms@xxxxxxxxxxxxx Subject: [argyllcms] Re: ArgyllCMS V1.6.1 released. Xavi wrote: > " For instance if the black on your printer aren't super deep (say L* > of > > 5) you may not notice the problem, since it's mainly due to some > electrical interference within the ColorMunki between the LED driver > and the spectral sensor, and a sufficiently large level of light will swamp the error." That's true, but it can also affect color accuracy for highly saturated colors too - if any part of spectrum should be at a low level, then this problem will tend to elevate the reading, causing errors in the a* and (particularly) b* values. But errors in highly saturated colors are harder to see, so perhaps this is not so significant. Graeme Gill.