Digital BW, The Print

Is the Clear Shield, Livick uses the Minwax floor product?

And has any one used this on there prints?

Steve

garethlock4472 wrote:
> 
> Found this link yesterday of anyone if anyone is interested
> 
> http://www.livick.com/method/inkjet/pg1.htm
> 
> Not into coating myself but thought you lot might like a read
> 
> Gareth
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Robert Morrison
> <rmorrison@p...> wrote:
> > I haven't tested the hydrocote coated prints, but when I was
> testing a
> > variety of of different acrylic based coatings with piezo inks I
> found
> > that under dry south window testing the coating improved the fade
> by up
> > to 100%...so this is the opposite of Paul's results with the
> Hydrocote.
> >   Honestly I'm still a bit skeptical of the aliphatic polyurethanes
> > being as good for paper coating as the acrylics...but this is not
> based
> > on actual comparative testing...just my knowledge of the respective
> > chemistries.
> >
> > Robert
> >
> >
> > On Saturday, August 9, 2003, at 06:35  PM, Paul Roark wrote:
> >
> > > jeffmoore17@c... wrote:
> > >
> > >> 1) Has anyone done any testing on the issue of whether or not
> coating
> > >> with a product such as Hydrocote Polyshield affects the archival
> > >> properties of Piezography carbon prints?
> > >
> > > I've fade-tested coated v. non-coated prints.  I assume the MIS
> and
> > > Piezo
> > > inks are about the same.  In general, the coated blacks faded a
> bit
> > > faster,
> > > although I think that could well be due to the higher dmax
> raising the
> > > temperature (by absorbing more light).  The black ink in the test
> was
> > > the
> > > MIS VM-K (probably the same as PiezoBW K).  The 50% patches were
> > > generally
> > > the same in terms of their fade rates.
> > >
> > > There was one other situation that seemed to accelerate the
> coated
> > > print
> > > fading.  I tested one group under very high humidity conditions.
> (The
> > > test
> > > light, etc. were right over a tray of water.)  The coated print
> did
> > > fade
> > > faster.  The uncoated prints faded at essentially the same rate
> as the
> > > low-humidity tests.  I speculate that the difference could be
> that the
> > > hot
> > > light artificially dries the un-coated prints, whereas the
> coating
> > > traps the
> > > water around the pigments.
> > >
> > > In general, we've always been led to believe that high humidity
> > > accelerates
> > > fading, but this has never shown up in my tests except for the
> coated
> > > prints.  One of the criticisms of accelerated testing is that it
> > > artificially dries the inks, with the result that the fade rate
> is
> > > reduced.
> > >
> > > So, I have 2 test results that seem to favor un-coated prints.
> I'm
> > > very
> > > suspicious that both are more artifacts of the testing than
> predictors
> > > of
> > > faster fading for PUR-coated prints.
> > >
> > >> 2) When coating Piezo prints with Hydrocote, after a good curing
> > >> period, can these prints be drymounted, i.e., Seal tissue and
> > >> drymount press?
> > >
> > > Yes, I've used Seal Colormount at 180 degrees f.  Be sure to use
> fresh
> > > release paper and wait the full 7-day curing period.  Also, with
> > > trimming
> > > the prints, a rotary trimmer might be a good idea.  I've noticed
> a bit
> > > of
> > > edge roughness when trimming with a straight razor knife.
> > >
> > > As an aside, one of the PUR experts told me that heat accelerates
> the
> > > cross-linking and curing.  Heating the PUR soon after application
> might
> > > actually make for stronger coating -- bringing the
> strength/extent of
> > > cross-lining of the single-solution, water-borne products close
> to the
> > > industrial products.  (The adhesion of a water-borne PUR will
> not,
> > > however,
> > > match the solvent-based products.)  This heating information
> suggests
> > > that
> > > the use of a hair-drier might not only speed the drying and
> curing,
> > > but also
> > > result in a stronger coating.
> > >
> > > Paul
> > > http://www.PaulRoark.com
> > >
> > >
> > >
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