Digital BW, The Print

> Roger wrote:
> ...
> > I am thinking these carbon inks are a solution to a major problem
I've
> > observed with the UltraChrome inks, to wit, even with UV protective
> > glass, a few minutes in sun causes the ink to outgas a haze which
> > condenses on the glass. ...


> > 1. Will the glycerin suspension in the Eboni-6 ink cause the same
problem?

I'm not sure.  However, I think of outgassing as a glossy "barrier
paper" problem. In matte papers it does not happen, in part, I'm told,
because the paper holds the glycols -- virtually forever.  Cellulose
apparently has a great affinity for glycol, which I've been told is the
main culprit.  The barrier of polyethlene in glossy papers stops the
paper from accomplishing this.

Whether glycol is really the culprit as opposed to glycerin is somehting
I don't know.  However, glycerin is also the main ingredient in Epson
inks besides water, so I'd think the Eboni-6 mix would react the same as
UC inks.  When I have the time, I'll try to test this.

> > 2. Are there 3rd party ink cartridges or CIS systems for the Epson
7600
> > that will accomodate the Eboni-6 ink?

I would think the 7600 would be easy to find carts for.  MIS and some
others made CISs for the large format printers, but I've never used
them.  I just refill the carts myself.  I'd expect hte 7600 to produce
results much like the 220 results I posted -- on that Premier Art Smooth
BW paper.  Be sure to see how Eboni-6 looks of other papers at
http://www.paulroark.com/BW-Info/Eboni-6.pdf
<http://www.paulroark.com/BW-Info/Eboni-6.pdf>


> > 3. Is it a plausible idea to buy a used 7600 to dedicate to the
Eboni-6 ink?

Very plausible.  My original target was me 7500, with the 7600 #2.  My
goal was to get a large format 100% carbon printing workflow going
because the R1800 3-MK workflow is limited to 13" paper.  I need large
format prints for my display prints.



Ernst Dinkla wrote:

>
> So a multi head PK BO may
> proof to be better at preventing "glass haze" but is
> off-topic in this thread.

As an aside, I have not found a PK that will produce the relatively
neutral prints I'm aiming for.  It looks like, in addition to the form
of carbon used, the base contents are a major factor in the typical
carbon warm tone.  The more "stuff" in the base, the warmer the image. 
Much of what is going on with -- and into -- inks these days appears to
be to get a better glossy image.


>
> The Eboni-6 is for matte as well I guess.

Yes.

> I have always thought that glycerine's is the actual haze
> medium and not the glycols.

While we know glycerol (aka glycerin & glycerine) is in Epson inks, they
actually do not say there is any glycol in them.  It may be hidden in
the "proprietary" materiels that are disclosed.  However, since glycerol
is disclosed and is a major part of the Epson inks, I think the Eboni-6
will probably react much the same as the Epson inks with respect to
fogging.

> The term BO for that inkset would be confusing
> too, there's less difference with normal quad ink sets other
> than that the pigment used is the same in all inks ...

I agree.  The Eboni-6 is actually most like Piezo K6 setups.

Paul

www.PaulRoark.com <http://www.PaulRoark.com>







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