Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul Roark" 
<paul.roark@v...> wrote:
> 
> I thought the green tint/metamerism was coming from the Epson UC 
color inks
> that are in the "B&W" 2100/2200 prints.  Does the green you see 
appear in
> the shadows or midtones?
>

Thanks, for your interest, Paul.

(I lost, I think, an earlier reply in the ether, so if there are two 
posts, I apologize.)

While I understand the question, in my ignorance I do not understand 
the thought process behind it.  This is because the green hue I am 
seeing in daylight is from the Ultrachrome photo black ink only, as I 
am printing in black only mode.  I would have thought that as there 
is but the one ink, the only difference would be in the amount laid 
down.  

Be that as it may, with black as zero and white as 100 on my modified 
Pettit wedge, the `noticeability' commences at around 22 and recedes 
at about 78 with prominence between 35 and 70 -  at least to my 
eyes.  I would have thought that this effect, which you indeed 
anticipated, relates to eye/brain function, but I don't know.

Were it not for this green hue, I think I would be satisfied with 
black only printing on my 2100 with IGSP and similar papers.  This 
makes me consider the equivalent Ultratone photo black with the other 
five Ultrachromes in place for colour printing.

If anyone has Ultratones fitted to their 2100/2200 I would be pleased 
to hear of their experiences printing black only on IGSP.  I 
appreciate that others may see the dots or dislike the dither, but it 
is mainly the hue issue in varying lights (and bronzing) for which I 
wish to find a solution.

Colin