QTR-Quadtone RIP

On 05/26/2011 02:25 AM, Paul Roark wrote:

> After that, for fine art, I prefer HP Z3100 Pk as a pigment for neutral
> glossy and very neutral to cool matte prints on almost all popular papers.
>   The HP PK dilution with MIS glop to stop bronzing is particularly
> interesting.

Paul,

An RC paper that I like to use with my HP Z3xxx printers, the Epson 
Proofing White Semimatt, shows some bronzing. The amount of Vivera gloss 
enhancer used changes it but is not totally removing it. I see it in the 
target patches I print at an angle of reflection but not dead straight. 
In a picture it is less noticeable. Despite that effect I might use it 
as that paper has no FBA content while the white reflectance is quite 
high. Together with the Vivera ink there is very little color shift 
between different light sources.

Could this bronzing be the result of a certain incompatibility of the 
Vivera Gloss Enhancer (and Vivera ink medium) to the Epson paper or do 
you see a more general bronzing effect with Vivera inks on gloss papers 
?  The HP ID Premium RC papers show it less in my experience. Would an 
overprint with MIS glop have another effect or is the bronzing set in 
the ink medium and no extra layer of glop will cure that ? Opinions 
differ on what varnishes etc do to bronzing.

I am also using the CMYK HP Vivera inks in a HP K5400DN Officejet and 
consider a B&W version of an A3+ Officejet model as a next step.  I like 
those models as they have a duplex printing facility, network, are fast, 
easy to change the separate ink carts to a CIS system and the heads can 
replaced if needed. The thermal heads used differ from the Z model heads 
but that has not given any issue so far. Using MIS glop may not be wise 
for dilution in the B&W version but Image Specialists has more up their 
sleeve on ink mediums and gloss enhancer. Could be just the same glob in 
an HP compatible disguise though.

-- 
Met vriendelijke groeten,   Ernst

Try: http://tech.groups.yahoo.com/group/Wide_Inkjet_Printers/

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