QTR-Quadtone RIP

On 06/01/2012 04:18 PM, dannyvanrijswijk wrote:
> Thank you both for your reply. MIS sounds very interesting as well.
>
> What if I just skip the QTR RIP software and use the standard print
> command.. (As suggested by the German Carbon ink reseller). Then I still
> don't understand one thing; if I would like to print with these carbon
> inks (MIS carbon inks or German Carbon ink 8 shades) and do this just
> with the standard print command from within Photoshop: how does the
> printer software know that it can print with all 8 ink gray cartridges?
> If I would insert K3 inks, it would pick black, the 2 shades of grey
> (LK, LLK) and perhaps some color to mix grey values.. But how does the
> print software know it does have not K3 but a whole range of Carbon grey
> shades to choose from?


Because the profiles contain special curves for Red, Green and Blue that 
interfere in the normal color mixing and translation to CMYK of the 
driver so grey inks can be used. Paul is a star in creating ACV curves 
in Photoshop for that purpose.

Load some curves in Photoshop to see how it is done:
http://www.paulroark.com/BW-Info/UT2-curves.html

The curves can be embedded in a special B&W ICC profile made with the 
QTR RGB profile creator. Together with a linearisation measurements file 
so the tone range will be ideal.

I have done the same for an HP Officejet printer that now runs MK, PK, 
Grey and Light Grey inks, the last mixed from HP Vivera PK pigment inks. 
Printing through the HP driver from Qimage.


-- 
Met vriendelijke groet, Ernst

Dinkla Grafische Techniek
Quad, pi\ufffdzografie, gicl\ufffde
www.pigment-print.com