Colour calibration for PPA printers ----------------------------------- If you have an HP DeskJet PPA printer (very cheap models: 710C, 712C, 720C, 722C, 820C, 1000C, or a newer printer which works with one of these model entries) you can optionally do a colour correction. Do the following: Some of the printing modes offer optional colour correction. See the option "Printing Mode" which is offered to you in the option window of "printerdrake" and if you use CUPS also in "qtcups" or "kprinter" ("Properties" button, "Advanced" tab), "xpp" ("Options" button, "Extra" tab), "kups" (right click on printer, "Configure printer" in menu), or the WWW interface ("Configure printer" button) and if you use PDQ in "xpdq" ("Driver options"). Choose a setting with "optional colour correction" and save your settings. Read the file /usr/share/doc/pnm2ppa*/COLOR.txt and follow the instructions there, but use the name /etc/pnm2ppa.gamma_normal for the colour correction file for the "normal quality" modes and /etc/pnm2ppa.gamma_best for the colour correction file for the "best quality" modes. So you can do the colour correction independently in both normal and best quality modes. The files are automatically taken into account by the appropriate modes as soon as they are created.