If anyone has missed the excellent Nikolay's testing workflow: //www.freelists.org/post/argyllcms/A-few-questions-an-idea-for-spyd2c-this-time-even-more-useless-than-before,3 //www.freelists.org/post/argyllcms/A-few-questions-an-idea-for-spyd2c-this-time-even-more-useless-than-before,4 >> This would also make a good addition to the documentation which does >> not tell anything about the sensible range of DE > It's very variable, depending on the details. Some well behaved devices > may give averages < 1 and peaks < 2, while things like xerographic printers > might be average 6, peak 15 That is exactly what I was thinking about! This sentence would make a perfect addition to the help file! > [...]so it's hard to give much guidance. You have just given an excellent one :). > I was going to look into some details, such as when the transcnt or > intclks is zero, and whether is is some integration time that guarantees > at least two transitions. Please pay close attention to sensv :) > There are some affordable and quite good charts available, > and US$10 is not that expensive: <http://www.targets.coloraid.de/>, Are these fully supprted by Argyll?