Digital BW, The Print

----- Original Message -----
From: "Paul Roark" <paul.roark@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Sunday, September 29, 2002 7:54 PM
Subject: RE: [Digital BW] New EAM


> Jeff,
>
> I read densities on a pile of white paper.  I suspect the differences we
see
> in our readings just reflect the inaccuracies of the machines.  As such, I
> suspect only relative densities with the same instrument are accurate
enough
> to measure the differences we are seeing in the papers.

Paul,

This is interesting and may explain some of the differences we have seen
between your X-Rite Digital Swatchbook and my Spectrocam. The Spectrocam
came with a ~9x12 black plastic plate and the recommendation to place all
samples on the plastic with nothing else underneath the sample being read.

It does make a small difference too. If I place a single sheet on the plate
my EAM reads C=0.06, M=0.06, Y=0.00, V=0.06. If I stack sheets up I get
C=0.05, M=0.04, Y=0.01, V=0.05. In either case this is still representative
of the faint blue/blue-cyan tint I usually associate with EAM. The batch I
have is a couple of months old.

Martin