In a message dated 1/21/08 4:37:44 PM, jeanchristophe.marie@... writes: The measure of the paper after calibration on the base is Lab: (99.31,-0.28,-100.26) Definately bad... I will clean the spectro this WE but I cleaned it before the calibration (without alcohol). Thats your only hope short of replacement (or not measuring brightened papers!) C. David Tobie Product Technology Manager Digital Imaging & Home Theater Datacolor CDTobie@... www.datacolor.com/Spyder3 **************Start the year off right. Easy ways to stay in shape. http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489