QTR-Quadtone RIP

Bill

I believe you should try to avoid the glop in the shadows increasing to 100 percent on the highlights.  The only issue this will create is that you will not get glop on the absolute whites in your image.

One workaround on missing the extreme whites is to set the image file to output your image to 254 instead of 255.  The difference is minimal...and it insures that the brightest whites in your image will have glop.

My solution for controlling the glop is to consider it a toner and make a seperate curve to control it.  In effect, it is an exact reverse curve...  0 glop to the blacks...100 percent to the whites....
 

Phil

--- In QuadtoneRIP@yahoogroups.com, "wpshumaker" <wmpshumaker@...> wrote:
>
> Looking for help with Gloss Optimizer on R1800.
> 
> I'm trying to build a curve with the PK and MK inks in the standard Epson UC ink set as described in Tom Moore's manual, but am having trouble getting a uniform layer of GLOP.  It's fine in highlights and midtones but there isn't any over the shadows, and the effect is not pretty.
> 
> My current curve is Ink Limit 100, black boost 0, MK density 55 Limit 50, PK density 100 limit 50, GL Load Curve, limit 100.  The GL curve is presently set to values of 100 for each of the 21 steps.  I have no idea if this is the right approach for the GL settings.  The grey curve is 6-10-0-1.  The net result is still too dark but I can work on that.
> 
> I cannot use a prefab curve as a starting point as Tom Moore suggests because there aren't any.  The curves that come with Quadtone for the R800 & R1800 are all matte.  The Chapin curves are .quad files only that cannot be edited in the GUI, not the underlying .qidf files.
> 
> I've tried everything I can think of, including pasting the GL curve from the Chapin warm-glop file (which delivers uniform GLOP on my printer, but uses R and B instead of PK) into my .qidf, or substituting a GL curve with all 256 values set to 19000, but nothing so far will deliver GLOP on the shadows.
> 
> Any information on how to get this working, and what's going on under the hood, would be most appreciated.
> 
> Thanks in advance,
> Bill
> 
> 
> --- In QuadtoneRIP@yahoogroups.com, "wpshumaker" <wmpshumaker@> wrote:
> >
> > You can download the Chapin curves at http://tech.groups.yahoo.com/group/QuadtoneRIP/files/Curves/R800%20and%20R1800/R800_F-A-Pearl_2880_v10_glop_and_no_glop.zip
> > 
> > 
> > --- In QuadtoneRIP@yahoogroups.com, "howegelimar" <howegelimar@> wrote:
> > >
> > > Hi all. I am new in to this forum, since I am trying to find a solution for my black and white printing workflow. I was a doing wet darkroom work for many years and just switched to digital recently (D700 and the Epson R1800). I know it is not the best printer for B&W prints, but after I tried out QTR on matte paper I was really impressed. I was rummaging the forum and read all that stuff about third party inks, Paul Roark's stuff and so on, but I do not want to convert my printer in a B&W-only-printer. Having that said, Is there any possibilty to print on luster or glossy paper with QTR on my R1800?  Or is it just time to buy a new printer (like the 2880 or the 3800)? I also read about Matt Chapin's curve-profile for glossy paper, where do  I get such a curve-profile? Thanks all of you!
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