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QTR-Quadtone RIP

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Message

Re: Curves help?

2006-09-29 by Tom Moore

Houston

You have posed question that could have a very involved answer.
Responding to some of the questions below might get the discussion going.

--- In QuadtoneRIP@yahoogroups.com, "houstonspencer"
<houston.spencer@...> wrote:
>
> 
> Would be very grateful for any advice on how to get started with
> developing curves to address the common issue outlined below. Having
> asked once before without result, I'd be particularly glad of any reply.
> 
> I've just run my first few prints via QTR on a 2100. I'm not getting
> anything like a match -- tonality and contrast --
> between screen and print. Two calibrated monitors on two different
> machines show significantly higher contrast and lighter mid-tones than
> the prints. I've played with gamma and ink limit adjustment in QTR,
> but they don't go nearly far enough to solve the problem.

With the appropriate QTR curve you shouldn't have to use much (if any)
gamma or ink limit adjustment to get close. 

> 
> (I'm using standard UC inks and standard EEM-equivalent paper.)
> 

When you say EEM equivalent paper what do you mean - which paper
exactly. You don't state which QTR curves you are using. Which are these.

> I'm assuming, at this point, I'm going to have to apply a curve,
> either to the image in PS or directly in QTR. But, frankly, I don't
> really know what I'm doing there, and I don't want to spend weeks
> profiling.

You should always be using at least 1 curve in QTR. If you're using UC
inks and EEM paper on a 2100, there should be should be curves already
available.

> 
> Does anyone have any newbie-friendly advice?
> 
> If this has been addressed before, I'd be much obliged for a pointer
> to the right thread, or any other good source.

Have you read the QTR User Guide?

It's also a good idea to state which machine type (PC or Mac), OS
version, QTR version, printer, inkset, paper brand and type, QTR
curves selected and any other details specific to your problem.  

> 
> Thanks in advance. --Houston
>
Tom Moore

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