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QTR-Quadtone RIP

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Question Re: QuadBlack inks available

Question Re: QuadBlack inks available

2005-05-08 by Richard Wolfson

> Shilesh Jani
> Subject: [QuadtoneRIP] Question For Wolfson Re: QuadBlack 
> inks now available
> 
> Richard,
> 
> Thank you for this message.  I have looked at your website, 
> which includes some more information.

Thanks Shilesh. It's new material, and I'll continue to post additional
info from time to time.
 
> Obviously you have found that QTR curve creation is not 
> easily capable of split-tone.  Would you be willing to share 
> (sell) the curve creation software you have created?

If a number of people express interest in the software I've built for
builting curves, linearizing, and blending cold and warm curves into
split curves, then yes, I'd be interested in making them available. But
I'd need to made it more friendly first, since my private version was
fast to build but not very friendly. 
 
> I was a little surprised that the "platinum" split-tone 
> profiles in your system uses all gray inks.  I would have 
> thought it would use only black, cool dark gray, and warm 
> light gray.  Unless of-course the cool and warm inks by 
> themselves are too heavilyly toned.  Can you provide some 
> more information?

The QuadBlack ink set includes blak and 4 grays -- dark and light cool
grays and dark and light warm grays. For each paper, I first make a cool
curve with black and two cool grays, then I made a warm curve with black
and two warm curves. 

Then for split-tone curves like neutral or platinum, I blend the warm
and cool curves using my blending tool, then re-linearize. So any
blended curve like neutral or platinum has 5 inks, plus surface
optimizer too if it's for a RC paper like luster.

A selection of R200/300/320 curves are available, and I'm working on
curves for the 2200 printer now.

Richard Wolfson
Fine Art Photographer, Printmaker,
& Digital Imaging Consultant

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