Thank you Gill, I use the backlit of the one I use for seeing the print (it is a backlit led photo frame) For the -t option and choose an illuminant what do you mean?I think it is a D50 illuminant and it should be the one used by default setting. But how to change in chartread?Or perhaps do you mean to change it in colprof command -i option?In this case I' ve read you can put a reading from a file .sp, but what command to launch to create my own illuminat reading of my particoular light box into a .sp file? Really sorry but I' m in the really near starting line of color knowledge?Have a nice time.Diego:) > Date: Mon, 2 Apr 2012 22:59:57 +1000 > From: graeme@xxxxxxxxxxxxx > To: argyllcms@xxxxxxxxxxxxx > Subject: [argyllcms] Re: Argyll colormunky and backlit printing > > Diego Carra wrote: > > Hi, > > > But should I read this patches in -e mode or -t mode? > > It depends on how you will use them. If the backlight > you are using is the one that will be used to view > the prints, then use -e. If the backlight is just for > measurement, then use -t and then choose an appropriate illuminant > (ie. one characteristic of what will be used to view > the print) when making the profile. > > > And perhaps Have I to create paches with the filmtarg command? > > No - filmtarg is for motion picture film targets. > > Graeme Gill. >