QTR-Quadtone RIP

Dear Mr. Boutwell,
Not sure if you meant your answer to me. But, I don’t use any specialty inks. I use the Epson K3 inkset.
Also, I have no clue what you mean by a bad quad profile. I wish I could get this thing better understood, it is costing me a lot in ink and paper……
Any guidance will be greatly appreciated.
Regards,


Moises Faidengold


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> On Nov 28, 2014, at 12:57 PM, richard@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote:
>
> In almost all cases, this is due to a bad .quad profile that was made with incorrectly set gray values or the overall gray curve is wonky. Based on just the measurement data, it looks like the Gray_val= settings are wrong, but that is without knowing what inks or printer you are using. (it looks like it would be the K3 inks since there are three spots where the curve has flat spots). Is this a profile you made one that was provided someplace else?
>
>
> Richard Boutwell
>
>

Richard,
Thanks for your response.
Well, so far what I’ve tried is the following:
Printed out of my mac os, using print-tool from QTR (the stand alone app, without color management) to three different papers. Ilford Gold Cotton Textured (matte), Ilford Gold Mono Silk (glossy) and Epson Exhibition Fibre (glossy).
The printed pattern is the 21 step target and the reading have been made with a Spectro from Syper print, using the L values.
The results from the measurement I tried to copy and drag over the linearize app from QTR and every time the message has been the same, can’t linearize.
I have not tried the ink limits part of the system.
I’m printing on an Epson 4880 using K3 inset.
I tried to create a custom profile from scratch, and it did not work. So what I have seen is that certain preloaded profiles do ‘kind’ of work. For example for Epson Exhibition I’ve used UCpl-SilverRag-neut, the same for Ilford Gold Mono Silk. I haven’t tried again with the matte paper because I haven’t switched to the matt black.
Thanks in advance,
Moises Faidengold

This transmission is intended to be delivered only to the named addressee(s) and may contain information that is confidential, proprietary, and privileged.  If this information is received by anyone other than the named addressee(s), the recipient should immediately notify the sender by E-MAIL . In no event shall this material be read, used, copied, reproduced, stored,  shared or retained by anyone other than the named addressee(s), except with the express consent of the sender or the named addressee(s).  
Esta transmisión tiene como objetivo su llegada única y exclusivamente al destinatario identificado arriba y puede contener información confidencial, de uso privado y confidencial. Si esta información es recibida por otra persona distinta a quien esta identificado como destinatario, el receptor desde informar inmediatamente al remitente por correo electrónico. En ningún caso este material puede ser leído, copiado,reproducido, archivado, compartido o retenido por cualquier otro que no sea el destinatario.

> On Nov 28, 2014, at 3:54 PM, richard@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote:
> 
> Yes, I was responding to your post, sometimes I don't know how Yahoo decides how or when to deliver these messages. 
> 
> 
> The .quad file contains the actual instructions the print driver uses that defines the amount of ink to lay down at each of the tonal steps along the grayscale. That .quad file is created with behind the scenes scrips based on the input values in the .qdif file (quad ink descriptor file). If those input values are incorrectly set then you could get the problems you are having—either the ink limits are set too high or the overlaps are not accurate. You can't actaul edit the .quad file (at least not easily) so you need to edit the .qdif file (or .txt file on a mac).
> 
> To better help understand what you are attempting to so and to better help you out here: Are you creating a profile from scratch or trying to linearize one of the raw profiles included with QTR? and are you using a Mac or PC? Did you print, measure and define the ink limits using the ink separate file printed with the QTR calibration mode? What printer and paper are you using (and what QTR profile are you using to print the grayscale stepwedge?)
> 
> I know this can seem overwhelming at first, especially if it isn't clear what is happening behind the scenes. 
> 
> All the best, 
> Richard Boutwell
> 
>