Re: gEDA-user: PCB produces invalid postscript

[DJ Delorie <dj@xxxxxxxxxxx>]

> OK understand. However I still wonder if the Postscript actually
> defines a device-independent shade of gray (this is quite easy to
> define physically as a fraction of white photon flux).

I don't think so.  They do define transfer functions and halftone
functions to allow you (or the printer) to adapt the color spaces to
your specific needs.  I think this is outside the scope of PCB though.