Digital BW, The Print

Paul:
Black dyes are generally mixed with yellow, to obtain a "blacker, more neutral black". 

Ilford Black tended to have a "magenta" cast. 

John Nollendorfs

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul" <roark.paul@...> wrote:
>
> "John" <jrnolly@> wrote:
> >
> > 
> >...
> > The life of "black only" dyes (not mixed with another color) should be quite good. ...
> > When dyes are mixed (like on an ink jet print with mixed colors) is when the catalytic interaction occurs, and print life is severely reduced...
> 
> I'll be testing for this.  I suspect the black is already a mix of colors, and it's biased to blue.  The black only tests are moving to higher Lab A values.  So, my addition of magenta, if I'm really lucky, will *just* offset that.  We'll see.  (While my tests are not the equal of Aardenburg Imaging, I was able to detect most of what we're now seeing in the more sophisticated tests.)
> 
> Paul
> www.PaulRoark.com
>