Digital BW, The Print

Paul, thank you very much. Very helpful.

All,

I am thinking these carbon inks are a solution to a major problem I've 
observed with the UltraChrome inks, to wit, even with UV protective 
glass, a few minutes in sun causes the ink to outgas a haze which 
condenses on the glass. The image changes in a way that resembles 
bronzing. This has happened to me at two different shows (Crested Butte 
and Teton Village) at relatively high altitude, but I took care to make 
sure the sun was only at a glancing angle--didn't seem to help. One 
additional piece of info is that both images were color.

Fortunately, the condensed haze evaporated after the framed print was in 
  the dark for a couple of days. These images had been printed for two 
months before they were framed.

1. Will the glycerin suspension in the Eboni-6 ink cause the same problem?
2. Are there 3rd party ink cartridges or CIS systems for the Epson 7600 
that will accomodate the Eboni-6 ink?
3. Is it a plausible idea to buy a used 7600 to dedicate to the Eboni-6 ink?

I've got a 4800 using the standard Epson ink and profiles that I'm quite 
pleased with, as long as the images are protected inside and away from 
the sun. I like to do some color printing, but the majority of my work 
is B&W.

Roger
Palmer Lake, CO
www.mindseyephoto.com


pr_roark wrote:
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com 
> <mailto:DigitalBlackandWhiteThePrint%40yahoogroups.com>, Roger
> <user1@...> wrote:
>  >
>  > Paul,
>  >
>  > I'm new to this users list, so here's a couple questions:
>  >
>  > 1. What is BO printing?
> 
> "Black ink only" printing; ...
> 
>  > 2. On your chart, is the Y axis something like a difference from
>  > expected value in db, or some other unit?
> 
> The Y axis shows the Lab A and B units. Positive Lab A values
> indicate red (more of a magenta-red to me), and negative Lab A values
> indicate green. Positive Lab B values are yellow, negative blue.

whoa! I was way off in the concept!

> 
> Paul
> www.PaulRoark.com
>