QTR-Quadtone RIP

Oops!  Somehow I managed to leave out the Light Cyan nozzle set.

Red = 247 selects the Light Cyan nozzles.

--- In QuadtoneRIP@yahoogroups.com, "davidkeasey" <davidkeasey@...> wrote:
>
> After searching through QTR documentation, tutorials, the posts and
> posted files, I couldn't find anything on how to go about making your
> own ink separation files.  And being too impatient to wait for someone
> else to fix the file I needed (the posted DTP-Inkseparation.tiff
> file), I managed to figure out what was needed.  In hopes of helping
> others with this little mystery, here is what I figured out, and am
> using for making my own custom ink separation files.  This guidance
> can also be used to prepare tiff images used to purge particular ink
> channels (if, for example, you have changed an inkset).
> 
> And please, somebody, if this is the wrong info, please let me know so
> it can be corrected.
> 
> Anyway, here goes:
> ===============  Ink Separation File Info  ===================
> 1.  File format:  TIFF
> 
> 2.  QTR Configuration:  File MUST be printed under Calibration
> Mode in Quadtone RIP.  After setting calibration mode, but before
> printing, you can open any Tiff file to print in this mode.  If it is
> not a special ink-separation image, the output will be wierd.  If you
> want to print the file again, you must exit calibration mode, then
> re-enter that mode, then select and print the file.
> 
> 3.  File must be in RGB mode
> 
> 4.  The entire printable image is color-channel coded.
> 
> 5.  The Blue Channel is always at maximum intensity, 255
> 
> 6.  The Red Channel indexes which ink nozzles are used for printing.
> 
>     a.  Red = 127 selects the Black ink nozzles.
>     b.  Red = 191 selects the Cyan ink nozzles.
>     c.  Red = 223 selects the Magenta ink nozzles.
>     d.  Red = 239 selects the Yellow ink nozzles.
>     e.  Red = 251 selects the Light Magenta nozzles.
>     f.  Red = 253 selects the Light Black ink nozzles.
>     g.  Red = 254 selects the Light-Light Black (or Gloss) nozzles.
>     h.  Red = 247 selects the Light Cyan nozzles [corrected entry] 
> 7.  The Green Channel sets the intensity of the ink coming from the
> set of nozzles selected.  Green = 0 sets maximun ink density.  Green =
> 255 sets ink density at Zero.  The typical ink-separation wedge uses
> 21 evenly spaced values for the Green channel.
> 
> 
> ==========  End of Ink Separation File Info  ===================
> 
>  I hope this info will be helpful to others.  It certainly would have
> saved me a several hours of headscratching and frustration if I'd
> known it earlier.
> 
> And finally...  If this info is wrong, please let me know so it can be
> corrected.
> 
> 
> Regards,
> Dave Keasey
>