QTR-Quadtone RIP

On 06/22/2012 08:37 PM, gmikol wrote:
>
> While it might take you a bit longer compared to starting with someone
> else's profile...may I recommend learning how to make profiles from
> scratch? It's a bit more difficult with a Mac, because you have to
> wrestle with the syntax of the file compared to the GUI in Win.
>
> I make this recommendation for a couple of reasons..1) you'll learn a
> lot about QTR and making digital negatives in the process, and 2)
> everyone has a different way of building profiles, and what another user
> did may not make sense to you, even if it works.
>
> Additionally, another user's light source, chemistry, development
> method, etc. make the profile essentially unique to that process (IMO),
> so you'll likely have to do a lot of tweaking anyway.
>
> The simplest curve to make uses only PK ink, and from that you can get
> used to using the ink limiting and curve controls, as well as
> linearization. Then you can tackle gray partitioning when you add the LK
> and LLK inks.
>
> Keep in mind that since multigrade B&W papers have some color
> sensitivity, be careful in applying colored inks...you'll have to
> carefully balance M and Y inks and apply them in tandem if you want to
> use them, otherwise you'll be activating different emulsions depending
> on where the M and Y inks get laid down, kind of like printing a C41
> negative on B&W multigrade paper.
>
> With all that being said, if you'd prefer to use someone else's profile
> as a starting point, I've got a couple of profiles for B&W paper that
> aren't totally fleshed-out (not linearized), but should get you started.
> Contact me off-list and I'll send them to you.
>
> Good luck...
>
> --Greg

A completely different inkjet printer, inkset and profiling method but 
possibly interesting to broaden the scope of this thread, the more when 
the mask's color is discussed:

http://h10088.www1.hp.com/cda/gap/display/main/index.jsp?zn=gap&cp=20000-13698-15259-15788^322739_4041_100__&jumpid=ex_R10931_go/digitalnegative



-- 
Met vriendelijke groet, Ernst

Dinkla Grafische Techniek
Quad, pi�zografie, gicl�e
www.pigment-print.com