Digital BW, The Print

>Does anyone know of a compatible ink base that will work 
>to create dilutions of Epson black ink... Ultrachrome or K3? 

I have some MIS base that is labeled "UC Base."  I have no idea if it's
really appropriate or whether they still sell it.

I made my own, using only things I knew were compatible since they were
major components of the UC inks, disclosed as such in the MSDSs.  My mix was
4 parts water to 3 parts glycerol. It seemed to work well with dilution of a
bit more than 1:1.  I'm not sure how high I'd go with the dilution since it
obviously excludes some components.  I've experimented with a wetting agent
for it also.  I just used Kodak Photo Flo.  It worked fine but was not
necessary at the dilutions I was using.

>What's used to adjust the viscosity?

This worked well: http://home1.gte.net/res09aij/Viscosity_Comparisons.pdf 

Have fun.

Paul
www.PaulRoark.com