Digital BW, The Print

Steve,

>Having had some fun (not!) totally ruining some sprayed prints on 
>Epson semigloss by rubbing Renaissance Wax on them - 

I like PremierArt spray on Epson Premium Semigloss.

>I am using a colour MIS CFS (CFS-2200-UC) but with 
>Eboni in the K position ...

Eboni will not stick to gloss paper.  It is the MIS version of Epson UC
Matte black.

>... blackless printing. ..

??

Do you Black Only ("BO") printing?

>  Why is it the Eboni ink that is causing all the bronzing issues 
>on RC paper 

I don't think it "bronzes."  What I call what Eboni does is "dust."  It does
not stick, has a dull finish, and rubs off.

>and not the other UT7 inks as well?  I thought the various shades 
>in the UT7 inks were in essence diluted K.

MIS 7600 & 2200 Light black is the main ingredient in the UT inks, and that
is RC compatible.  Eboni is not used at all in the diluted or "color"
position inks in the UTs.

The UT inks do bronze on the micro porous RC papers like Epson Premium
Semigloss & Ilford Smooth Pearl.  They do not bronze on Epson Glossy Photo
Paper and similar papers using that (older, and dye-oriented) coating
technology.

Paul
www.PaulRoark.com 

For UT2 & UT7 information, curves, and settings see:
http://home1.gte.net/res09aij/