Paul:
The backing *does* make a significant difference. I just wanted to
eliminate one potential variable by comparing your apples to my
apples. I think the majority of the difference between my white
backing readings and yours is more likely due to the paper lot (I was
reading off some just opened but older EAM, Lot # 01KK1026M). Of
course, Swatchbook instrument variability also contributes some to
the differences.
Jeff Randall
--- In DigitalBlackandWhiteThePrint@y..., "Paul Roark"
<paul.roark@v...> wrote:
> 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.
>
> I asked an X-Rite rep about getting more accuracy -- including more
> significant places. It can be done, but we're looking at many
thousands of
> dollars. So, I decided I could live with the limited accuracy. It
at least
> beats the scanners I was using.
>
> Paul
> ___________________________
> -----Original Message-----
> From: Jeff Randall [mailto:jrandall@c...]
> Sent: Sunday, September 29, 2002 6:09 PM
> To: DigitalBlackandWhiteThePrint@y...
> Subject: Re: [Digital BW] New EAM
>
>
> Paul:
>
> I get EAM densities of c=0.05, m=0.05, y=0.03, visual=0.05 if I
back
> the sheet with a dark sheet, and c=0.04, m=0.03, y=0.01,
visual=0.03
> if I back it with a white sheet. How do you take your density
> measurments?
>
> Jeff Randall
> Preston, WA
>
>
>
> I --- In DigitalBlackandWhiteThePrint@y..., "Paul Roark"
> <paul.roark@v...> wrote:
> > Shilesh,
> >
> > Your wrote:
> >
> > >I posted a message about a month ago on new EAM being warmer.
The
> > >paper I bought was also from Atlex, 8.5 x 11, Lot No.
02CC2004M. I
> > >found the same Lot No. at the local CompUSA, equally warm. And
yes,
> > >it has weaker blacks. ...
> > >this is really bad because EAM is THE inexpensive steady
> > >war-horse ...
> >
> > Yes, I recalled your post when I ordered my new EAM from
> atlex.com. I guess
> > it was wishful thinking that Epson had taken care of the
problem.
> I wonder
> > how long this lot number is going to be out there.
> >
> > The letter-size EAM I received is lot # 02CC2004M -- the same
are
> yours.
> > The paper white on it reads: c=0.05, m=0.05, y=0.04,
visual=0.05.
> The black
> > is between 1.60 and 1.61.
> >
> > Several older batches of EAM have white paper readings of
c=0.04,
> m=0.04,
> > y=0.03, visual=0.04. So, the new doesn't actually read yellow;
> it's just
> > not as bright. It does have a more yellow look, however.
> >
> > The blacks on my old EAM samples are not consistent. On my
1160 I
> usually
> > assumed I'd see between 1.64 and 1.65. A January 2002 test
strip
> that has
> > been in dark storage (but close to acid paper) reads 1.65. A
test
> strip I
> > printed with the 3000 yesterday on the January paper has a black
> density of
> > 1.66. I usually do expect slightly darker blacks with the 3000.
> The new
> > EAM, thus, is about 0.05 to 0.06 units weaker in the blacks than
> was the
> > January batch.
> >
> > On the other hand, the batch of EAM I just used up routinely hit
> 1.68 with
> > the 3000.
> >
> > I cut a small piece of EEM off a new roll I purchased. I don't
> know the lot
> > number. The roll has the expected white paper reading of
c=0.04,
> m=0.04,
> > y=0.03, visual=0.04. However, it's blacks only hit 1.64 with
the
> 3000.
> >
> > So, the paper is just inconsistent. The new batch that only
hits
> 1.60 with
> > the 3000, however, is so weak I'm going to complain and see if
> there is a
> > possible swap I can make for a different batch number. I
suppose
> I'll start
> > with the Epson Connection # (800)463-7766. If anyone has a
better
> number,
> > let us know. If that is the only batch, I suppose I'll keep it -
-
> at least
> > until there is a better lot number out there.
> >
> > Paul
> > http://www.PaulRoark.com
>
>
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