Digital BW, The Print

Martin,

Were you using the water-based Varathane or the solvent-based one?

Paul
_____________
  -----Original Message-----
  From: Martin Wesley [mailto:mwesley250@...]
  Sent: Monday, October 14, 2002 8:43 PM
  To: DigitalBlackandWhiteThePrint@yahoogroups.com
  Subject: Re: [Digital BW] Is there a difference? - Coatings




  ----- Original Message -----
  From: "Robert Morrison" <rmorrison@...>
  To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
  Sent: Monday, October 14, 2002 9:28 PM
  Subject: Re: [Digital BW] Is there a difference? - Coatings


  > On 10/14/02 8:26 PM, "Paul Roark" <paul.roark@...> wrote:
  >
  (snip)
  > >
  > > Varathane makes several water-based "Diamond Wood Finishes" (blue can
at
  > > your local hardware) that appear to work very well -- no dilution
  needed.
  > > The "Outdoor" version has UV inhibitors that could be useful (in fade
  > > testing now).  However, I don't like much yellowing, and, like UV
  filters,
  > > these UV inhibitors are slightly yellow.  The Eclipse, however, is
  bright
  > > enough and blue enough that with one coat it stays bright and 0.01
units
  > > cool.
  > >
  > > EAM just gets too yellow with the UV inhibitors.  So, to get rid of
them
  > > with polyurethane, use Varathane "Interior."  This formula was made
for
  > > maximum clarity.  With EAM the first coat remains almost a matte and
the
  > > Dmax is only up to 1.72.  However, with a second coat EAM is a nice
  luster
  > > with up to 2.33 for the Dmax.
  >
  > Stay clear of polyurethane--they yellow terribly.  Martin's varathane
  prints
  > turned completely yellow in about 6 months.
  >
  > The water-based golden products are all 100% acrylic...absolutely no
  > polyurethanes.
  >
  > Robert
  >
  Paul,

  Robert is definitely correct on this. I coated a number of prints with the
  Varathane Diamond coating that are now about 16 months old. The Varathane
  coated prints are now extremely yellow and the Golden Acrylic coated
prints
  are unchanged. It is a shame because I found the Varathane the easiest to
  work with. Another choice that has held up well with time was a water
based
  vinyl coating called ClearSheild that is sold by sign making supply
  companies for over coating inkjet printed banners for outdoor display.

  Martin


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