Hi Graeme, Thank you, so it seems I don't have to worry about re-reading any patches then. And I know it is lame but can anybody explain or direct me where I can find explanation on how to read and use visual data provided by profcheck? It is a first time, when I can, instead of scratching the surface go deeper into colour profiling and I would like to learn more So what should I read, because frankly speaking I understand maybe a half of tutorials provided - some of it is due to language barrier but most of it is due to lack of knowledge... And all of that thanks to you Graeme and your sophisticated piece of software - it keeps me to want to know more about what I do - mostly for pure fun of it ;] You live and learn - that's what they say. ;] -- t.danus@xxxxxxxxx Skype: Ithilstone 1DE is meant to be a just noticeable difference. In practice achieving > less than 1DE accuracy in matching color values can be difficult. > > Graeme Gill. > > Seem a pretty good fit of model to the sample data. Generally