Digital BW, The Print

Ernst,

The Epson Archival black in the CF (called "Archival" in the U.S.) inkset is
clearly the one that should be replaced first.  My fade testing suggests it
is not a 100% pigment ink.  It tests out almost exactly like the old PiezoBW
and MIS FS & VM black inks.  Eboni and Epson UC Matte black appear to be
much more lightfast.

In my current fade test I have not only a UC-based B&W inkset, but also one
that uses the UC Photo and Light black pigs with the Epson Archival color
pigs to cool them down.  It should be interesting to see which one does
better. 

Paul
www.PaulRoark.com 
__________________

-----Original Message-----
From: Ernst Dinkla [mailto:E.Dinkla@chello.nl] 
Sent: Sunday, July 04, 2004 12:29 AM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: Re: [Digital BW] Simple bases (was Blackless printing)

Paul Roark wrote:
> Ernst,
> 
> I forgot to mention the glycerol mixing ratio to get the viscosity right:
> it's 4 parts water to 3 parts glycerol.
> 
> Paul
> www.PaulRoark.com 

Paul, thank you.

I will try it first on the Epson 10000CF black > Eboni.  With 
good profiling I can use the rest of the Epson Archival inks till 
they have to be replaced. So far with ink changes on 9000's and 
9600's the Eboni was the most problematic to get running but the 
density it delivers must be better than the Archival black does.

BTW, I tested a silkscreen varnish that a befriended manufacturer 
delivered. Explained the qualities of the Hydrocote. He got me a 
UV curing aliphatic polyurethane. As I understand it this isn't 
new but an existing formula. It is water clear on gloss papers 
and hardly visible on matte papers. Good gloss. I'm not so sure 
whether it adheres well on gloss papers (PPGP).
Deepens the colors on matte but it is difficult to harden the 
coat then as it penetrates too much. The smell then stays which 
isn't a nice one..  The advantages are the longer time one can 
use for applying (in case of one or few prints I use a foam 
roller), there's no solvent in it so the layer applied stays as 
thick, probably no water in it either but I saw some dissolving 
effects on dye inks. The crosslinking of the urethane should be 
better than with dispersions, so a true skin. Needs a UV curer. 
So a mixed bag.

Ernst



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