Digital BW, The Print

Pardon me for jumping in...

I have tried four different krylon products as a fixative for B&W prints to
keep the coating from flaking. The matte spray was not at all helpful.
Workable Fixatif caused the least amount of change but it most certainly
caused an increase in density at the black end of the curve. UV Resistant
Clear caused a bit more and Kamar varnish the most. I have a post some where
in the dim past where I gave the readings from a reflection densitometer.
Lyson Print Guard was between Workable Fixatif and UV resistant clear. If
not overdone, the workable fixatif product seems to do the job. I haven't
checked any of the test prints with a densitometer to see how they have
resisted  change but by eyeball, no visible changes have been obvious. On
the other hand, I have had no problems with surface flaking with sprayed
prints.

I use three thin coats when I spray with enough time for the surface not to
feel tacky between sprays. I let the prints dry a full 24 hours once they
have been sprayed before handling them.

To cut to the chase, do I do this routinely? No I don't. I am not convinced
it is worth the chance of irrevocably buggering a print. The major problem I
have found is that you can't accurately predict the amount of increase in
density from print to print. When I was experimenting with this a fair bit I
could go back and use a correction curve to compensate before spraying and
was usually somewhere in the ball park. Still, it adds a somewhat
uncomfortable degree of uncertainty to the whole process.

Roger

Roger L Sopher
rlsopher@...
http:\\deCorrales.com



  -----Original Message-----
  From: sandersm@... [mailto:sandersm@...]
  Sent: Wednesday, May 28, 2003 12:48 PM
  To: DigitalBlackandWhiteThePrint@yahoogroups.com
  Subject: Re: [Digital BW] Digest Number 1545



  > When you say the Krylon changed the pigments dramatically, was that
  > immediate, or over time?
  >
  >
  It was immediate.   It took a smooth tonal gradient, running from dark to
  light, and turned it into a light clump and a dark clump, so that the
resulting
  image looked as if the subject were peeling after a bad sunburn.   It also
  turned a head of fine blonde hair into a clump of greywhite goo.   This,
using
  Krylon's UV-Resistant Matte Finish.   I did not have the same problems
with the
  UV-Resistant Clear finish -- it just left the surface glossier than
before,
  without changing or obscuring the print.

  Sanders.


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