Digital BW, The Print

Walt,

I have pure color (K, C, LC, M, LM, and Y) at 25%, 50%, 75%, and 100%
coverage using QTR on my south facing window in Memphis, TN now for 2 
weeks. Comparisions are NanoChrome, R220 dye, and 4000 UC on EEM, 
EPG, EPSG, and one Hahnemuhle paper.

I am giving it 4 weeks before I take a peek with an I1.

Shilesh

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Walt Mucha" 
<wkm@k...> wrote:
>
> Hi Carl
> 
> What you're seeing is not metamerism. The light temperature of 
halogens and incandescent are a considerably warmer color temperature 
than daylight and that in effect will neutralise a cool tone print. 
Put it under plain flouresent light and you'll probably see a 
green/cyan cast. As to Dmax. If these inks last longer than dyes then 
that's good, if not, it's not all that spectacular. Still waiting for 
someone to put a color print in their window. I might have to spring 
for some of these inks myself just to satisfy my morbid curiosity ;-)
> 
> Regards, Walt
> 
> 
> -----Original Message-----
> From: Carl Schofield [mailto:scho@m...]
> Sent: Sunday, January 22, 2006 09:36 AM
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: [Digital BW] Nanochrome blue
> 
> Today I made some visual comparisons of prints I've made over the  
> past few days using Nanochrome black ink in an Epson 4000 and  
> printing BO mode, mostly on Hahnemuhle Photo Rag 308 and 
Hahnemuhle  
> Photo Rag Satin.  In daylight the prints have a cold blue/black  
> appearance, slightly cooler with the satin compared to regular 
photo  
> rag.  Under halogens or normal incandescent lighting the prints on  
> both papers appear dead neutral.  So this cold blue color we have  
> been discussing with regard to the Nanochrome black inks (K and 
LK)  
> appears to be a metameric phenomenon.  This NOT the ugly 
metamerism  
> we have seen before with other inks that changes on the 
magenta/green  
> axis, but rather a cool/neutral shift.  Seems like the black inks 
may  
> have been designed for neutrality under incandescent or halogen  
> lighting.  Dmax is just terrific on these matte papers (1.9-2.0).
>