QTR-Quadtone RIP

Oh and I forgot to ask , Paul could you explain  how I can import a curve into my Epson printer driver   I have a P800.





Thanks





Eugene











De : QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com]
Envoyé : July-27-16 12:19 PM
À : QTR-Forum
Objet : Re: [QuadtoneRIP] QIDF versus ICC








I'm not going to attempt to answer all the questions, but just thought a few notes might be helpful.





I work in Windows and find the GUI for the Curve Creator (as well as main QTR interface) to be a great asset.





Among other workflows, I make image adjustment curves in Photoshop that, through the Epson driver, can control my inksets.  However, I prefer to embed these curves in an ICC.  I do that with QTR's Create ICC-RGB.  Then I simply print from PS, through the Epson driver, pull up the ICC, and I have a "color managed" workflow.  In this case "color managed" means that the Lab L values -- the gray ramp -- are printed such that they should what you see on a properly profiled monitor. The ICC workflow is easy and fast.  (Be aware that most monitors are not very well profiled, however.  You may need to attend to that also to get a good match.)





Usually I print through QTR, which acts as a stand-alone driver in Windows.  To make a QTR profile, I use curves that are very much like the Photoshop curves, except I have much better control.  QTR in Windows is not a "color managed" workflow that reads the file's workspace and prints to match it.  For my work (and I post all the curves and profiles) I use a Photoghop curve to make the adjustment between my file's Gray Gamma 2.2 and QTR's straight line Lab L response curve ("characteristic curve" for the old film guys).





So, from my perspective, "profiles" for printing have curves within them.  We often use the terms generically to refer to the software that controls the printer and how the inks are laid down.





It's a long learning curve but worth it.





FWIW





Paul


www.PaulRoark.com





On Wed, Jul 27, 2016 at 7:34 AM, info@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote:





Hi I’m new to this,  I’ve done my home work but I’m confused about somethings.





 I’m using a PC but I also have a MAC and could switch to it if the fact that I’m using a PC is contributing to my confusion.  In some of the on line literature, as well as here in this forum  it appears as though the qidf curves are being referred to as profiles.  My intuition tells me that these curves are more like media type settings since they control ink levels. The profile would be the ICC profile being created using the Eye one and the Create ICC RGB droplet.  If my intuition is correct than the curves (media types) and profiles should be working in tandem.  Yet I have never encountered, in the any of the manuals or tutorials an indication that the curves are used in conjunction with the profile. In fact on a PC it is not clear how one might use the QTR rip with the ICC profile (unless of course the files are previously converted in Photoshop)





Are the ICC profiles simply for soft proofing  and if so does this mean that results sent from the RGB ( or Greyscale ) work space  through the QTR rip using the ink level curve are identical to a virtual colour conversion to the ICC profile (created using the quid curve) ?





Thanks for any clarification you can provide me





Eugene