Digital BW, The Print

John,

> ... Why in the world if the
> yellow channel is the PRIMARY ( though certainly not total) change in the
> Epson pigment inkset from Archival CF to UltraChrome, is it not possible
> to
> just replace that yellow ink with theUltrachrome equivilent and, remake
> profiles and the driver for everything, with much improved results.

I think one of the primary changes between the Archival and UC inksets was
the pigment load.  The UC inks have, I believe, a higher load of pigment
particles.

By the way, in my initial fade tests of B&W inksets made with UC LK and UC
or Archival color pigs added to neutralize the warmth of the LK, the UC
performed better than the Archival.


>...I am completely satisfied with the CF inks rendition of all colors
> except
> the ones such as yellow, red, and orange, where intensity is needed in
> these
> hues.  This CF yellow also has much worse metamerism.The blues and
> greens are just beautuful to me and so much nicer than anything we had to
> work with in chemical color printing just as in Ultrachrome. Yea the
> Magenta
> may be a little weaker also but it is the yellow that is the big limitaion
> of this
> inkset for color control. 

I suspect you could just use the UC yellow and not do any harm to anything.

>Of course the black component is different but that's a
> different problem with different solutions.

The archival K tests out just like the old MIS VM.  I suspect it is a hybrid
black.  The UC MK and PK are much stronger.

Paul
www.PaulRoark.com