Digital BW, The Print

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@...]
  Sent: Sunday, September 29, 2002 6:09 PM
  To: DigitalBlackandWhiteThePrint@yahoogroups.com
  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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