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Is this correct?

Is this correct?

2017-09-14 by david@...

I am working on a paper that references the use of QTR and want to be sure I am not saying something that is untrue...


Am I correct in saying that in a QTR B&W profile, say for example, using MK, LK and LLK propretary inks to keep it simple, that LK, takes over from MK at a fixed point and then LLK takes over from LK. Or do they in fact overlap instead, with MK continuing to print while LK increases, etc.?

dk

Re: [QuadtoneRIP] Is this correct?

2017-09-14 by Paul Roark

David,

Do you have access to a Windows PC? The "Show curve" function in the QTR Windows GUI is very helpful.

Paul
www.PaulRoark.com
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On Thu, Sep 14, 2017 at 10:01 AM, david@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote:

I am working on a paper that references the use of QTR and want to be sure I am not saying something that is untrue...


Am I correct in saying that in a QTR B&W profile, say for example, using MK, LK and LLK propretary inks to keep it simple, that LK, takes over from MK at a fixed point and then LLK takes over from LK. Or do they in fact overlap instead, with MK continuing to print while LK increases, etc.?

dk


Re: [QuadtoneRIP] Is this correct?

2017-09-14 by David Kachel

Paul,

OK, this is me, slapping my forehead\u2026 duh!
It\u2019s not like I\u2019ve never seen one of these before. I\u2019;ll use tunnel vision as my excuse, OK?

Anyway. Looking at the curves, would I be correct in thinking that the peak of each curve represents the point where that ink has been set to take over from the next darker ink? In other words, how is the positioning of each curve determined in relationship to the previous curve?


David Kachel

_________________________

Artist-Photographer
Fine B&W Photographs & Photogravures

WEBSITE: www.davidkachel.com
BLOG: thetransparentphotographer.com
EMAIL: david@...

PO Box 1093
Bisbee, AZ 85603
(520) 366-4181

From: <QuadtoneRIP@yahoogroups.com> on behalf of "Paul Roark roark.paul@... [QuadtoneRIP]" <QuadtoneRIP@yahoogroups.com>
Reply-To: <QuadtoneRIP@yahoogroups.com>
Date: Thursday, September 14, 2017 at 11:01 AM
To: QTR-Forum <QuadtoneRIP@yahoogroups.com>
Subject: Re: [QuadtoneRIP] Is this correct?

Show curve" function in the QTR Windows GUI is very helpful.

Re: [QuadtoneRIP] Is this correct?

2017-09-14 by Paul Roark

The next curve starts before the peak of the lighter one. You'll often see in in the QTR "Show Curves" graph that there are actually two distinct turning points. Only Roy knows the algorithms he's using, but when that first distinct turn-down in the positive slope of the light ink starts is probably where the darker ones starts. You can to into the *.quad file and see for sure if you're interested in the exact point.

Paul
www.PaulRoark.com
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On Thu, Sep 14, 2017 at 12:36 PM, David Kachel david@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote:

Paul,

OK, this is me, slapping my forehead… duh!
It’s not like I’ve never seen one of these before. I’ll use tunnel vision as my excuse, OK?

Anyway. Looking at the curves, would I be correct in thinking that the peak of each curve represents the point where that ink has been set to take over from the next darker ink? In other words, how is the positioning of each curve determined in relationship to the previous curve?


David Kachel

_________________________

Artist-Photographer
Fine B&W Photographs & Photogravures

EMAIL: david@...

PO Box 1093
Bisbee, AZ 85603

From: <QuadtoneRIP@yahoogroups.com> on behalf of "Paul Roark roark.paul@... [QuadtoneRIP]" <QuadtoneRIP@yahoogroups.com>
Reply-To: <QuadtoneRIP@yahoogroups.com>
Date: Thursday, September 14, 2017 at 11:01 AM
To: QTR-Forum <QuadtoneRIP@yahoogroups.com>
Subject: Re: [QuadtoneRIP] Is this correct?

Show curve" function in the QTR Windows GUI is very helpful.


Re: [QuadtoneRIP] Is this correct?

2017-09-15 by sanking@...

You can also see the shape of the curves in MAC with the QTR Curve program and opening the. quad file. To access this in MAC go Library>Printers>QTR>quadtone>QuadPritner, and then opening the .quad file.

Many people, even MAC users, appear to believe that the ability to view the curve shapes of the individual inks is unique to the Windows GUI, which is not the case.

Sandy



Do you have access to a Windows PC? The "Show curve" function in the QTR Windows GUI is very helpful.

Paul
www.PaulRoark.com

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