Alastair M. Robinson wrote: > My own experiments with GPLin have been using Gutenprint with pretty > much everything turned off - basically I feed in n-channel data and > Gutenprint just dithers it and puts it on the page. I've found I need > a quite extreme gamma adjustment [...] Well, I'm not surprised. Dispersed halftones can indeed result in a quite large dot gain, particularly on printers whose dots (or ink drops) have a (sometimes significantly) larger diameter than 1.0 / dot_placement_resolution. And I tend to agree - when the "gamma" value is getting too large then a wedge with a linearly spaced steps in device space is possibly no longer optimal for characterizing the response wrt. a perceptual metric. Regards, Gerhard