QTR-Quadtone RIP

Dan is a good resource. You might also try looking at the archive of the alt
photo process group. I have avoid some of this type of testing because every
year it seems a new  ink, or printer comes out that completely blows away
the last set up that took days and weeks to develop. I may take that plug
with an ink set I am testing but then again, maybe not..   

 

 

Hours and hours for  one more better set?  Mark Nelson is alos a good source
to look in to for digital neg stuff. 

 

 

Eric

 

Eric Neilsen Photography

4101 Commerce Street

Suite 9

Dallas, TX 75226

http://e.neilsen.home.att.net

http://ericneilsenphotography.com

Skype ejprinter

  _____  

From: QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com] On
Behalf Of joachim oppenheimer
Sent: Friday, February 22, 2008 8:06 AM
To: QuadtoneRIP@yahoogroups.com
Subject: RE: [QuadtoneRIP] Re: How does the printer / QTR lay down different
color inks

 

Contact Dan Burkholder for guidance on using color pigment inks.
-----Original Message-----
From: QuadtoneRIP@ <mailto:QuadtoneRIP%40yahoogroups.com> yahoogroups.com
[mailto:QuadtoneRIP@ <mailto:QuadtoneRIP%40yahoogroups.com>
yahoogroups.com]On
Behalf Of David
Sent: Thursday, February 21, 2008 6:21 PM
To: QuadtoneRIP@ <mailto:QuadtoneRIP%40yahoogroups.com> yahoogroups.com
Subject: [QuadtoneRIP] Re: How does the printer / QTR lay down different
color inks

Right now I'm printing with matte black ink only at 1440x1440 dpi to
create digital transparency "positives." I use these in an UV
exposure unit to create etching plates from UV light sensitive film--
the dots of ink block underlying areas on the plate from being
exposed and these develop differently than areas that are exposed to
the UV light.

My image on the transparency is made up of black dots only, similar
to a bitmap image, and this creates the "bite" (low spots that hold
ink) in the etching plate. The problem is that the matte black in
does not adhere well to the transparency films I'm using and can be
smudged with my finger.

I have two solutions: to switch to photo black ink (which is less
opaque than matte black) or to create the transparency using color
inks, for example all magenta, or all cyan, or red or green.

In essence, I'm trying to replace all my black dots of ink with all
colored dots of ink that I hope will have similar or better UV-light
blocking capabilities.

The idea of using colored inks came from someone who uses them for
digital negatives, and says they give better coverage than black
inks.

So I'm trying to find a way (see my settings below) to use color inks
in place of the black only ink.

Does that help explain it? Best, David.

--- In QuadtoneRIP@ <mailto:QuadtoneRIP%40yahoogroups.com> yahoogroups.com,
"Olivier" <odesmais@...> wrote:
>
> > I'm going to still try using QTR to print in color, and here's
what
> > I'm thinking:
> >
> > For printing Magenta only:
> > * default ink limit: 85
> > * black boost: blank
> >
> > Magenta Ink
> > * Density 100
> > * Limit: blank

> > Otherwise, no changes to gray or toner curves, and no
linearization. (And I might repeat this, only using Cyan).
> >
> > For printing with Magenta and Yellow (to get Red), I'd do same
settings for Magenta and repeat these settings for Yellow.
> >
> > I'll print at 1440x1440 super to get the dot structure I need for
my etching plates.
> >
> > I have tried to understand QTR but mostly I'm baffeled by it all,
so I'm sort of winging it (trying things without knowing what I'm
> > doing).

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