Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Jo Brunenberg" 
<jo.brunenberg@r...> wrote:

> As for Lyson, I have made tests about a year ago. Liked their "rich 
blacks" .
> Unfortunately their small gamut inks faded very fast when exposed 
to sunlight.

What is the concept of these "small gamut" inks?  The description 
says they are color inks designed for monochrome printing.  My 
understanding is that the use of some color allows for toning. Are 
they dye or pigment based?    

So when you say they faded, do you mean that they became lighter 
across all colors, i.e., that a medium-gray became light gray, or do 
you mean there was a color shift, e.g.., that the yellow component 
faded out so the prints shifted to the blue?