QTR-Quadtone RIP

Hi Sheila,

There are several people in this group and the B&W print group (I referred
to in my last email) who spray their prints.  I have not tried it, but the
threads on the group emails say it works.  An archive search should yield
results.

The main knock against this approach is that these sprays can be pretty
nasty (health wise if you breathe them) and some people want to avoid
exposing themselves to these materials.  GLOP can be put down in a printer
so there is no spray to deal with.

Other people are trying Epson K3 or MIS K4 inks in older printers like ours
to try and gain the benefit of inks that are inherently better from a
bronzing and gloss differential perspective.  It's just another way to try
and solve the problem.

As for the reason for bronzing, I am certainly no expert but I believe it
has to do with the interaction of light to pigments of certain colors as
well as the relative reflectivity of the pigments versus the paper itself.
I am sure one of the experts on this list can better explain.  It is very
noticeable on gloss or luster type of papers and it is the paper and ink
combo that magnifies or minimizes the problem.  I have not heard of it being
different from one batch of a certain paper to another but I suppose could
be the case if the paper coating changes from batch to batch.

Paul

> Thanks for the explanation.  From what you are saying, it sounds like
>  GLOP is the same as what the R800 uses for glossy paper?
> 
> I wonder if a spray like Premier Art Shield would work also?  Do you
> know if anyone has used that?  It would be a lot easier than changing
> inks.
> 
> Do you know what causes the bronzing?  I printed a large black and
> white on a new roll of Premium Lustre, and I could not detect any
> bronzing.  But on the previous roll, with a different print, it was
> very noticable.  I had not replaced any inks, so it seems like the
> paper is the culprit.  I wonder if Epson has made any changes to the
> paper to address the problem.
> 
> I would prefer not to have to change inks if there is an alternative.
> 
 

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