Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Peter 
Nelson" <peter@s...> wrote:
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Stan 
McQueen 
> <stan@s...> wrote:
> 
> > My friend's black and white prints, printed on his 2200,
> > look magenta under fluorescent and green under sunlight,
> > but neutral under tungsten. (I may have the magenta and
> > green reversed, I can't remember.) Is this metamerism?
> 
> Yes, and that is the usual pattern with the 2200 - magenta
> under flurescent and green under daylight.
> 
> See my website for a discussion of this:
> http://studio-nelson.com/inkjet/bw22001.htm

Peter,

Very nice write up about inks and dithering an all.  A minor
nitpick is that you show how 2 inks give more gray values.
Quite true, but its even more dramatic than that -- the 2x2
pattern can give 15 possible grays without overprint .  And
with overprint lots more than that although you will get many
duplicates by then.  One of the crucial issues if how much
lighter the light ink is.  I think most light inks are quite a
bit lighter than 50%.

Roy