Digital BW, The Print

Hi Robert,

I think you missed my point. Acrylic paints are somewhat a different kettle of fish than coating a sheet of what is appreciably watercolor paper with a sealer of some ilk. My wife is a professional artist and paints with all media including acrylics so I am reasonable familiar with them and their properties. (I would like a buck for every canvas I have stretched for her or worse every egg tempera panel I have made.) 

I think the unknown is the effect of encapsulating (for want of a more precise term) an ink & paper product with some form of polymeric plastic. The liquid material is going to penetrate, to some degree depending on a host of factors into the paper and the possibility of some interaction is, I think, real. With carbon based inks it is probably minimal but...

A lot of years ago I was involved in doing cabins material safety for the Apollo capsule and many  "cured" encapsulation materials continued to be reactive and/or outgas for a significant period of time even though they were "solid" causing them to be rejected for use in the cabin. The stuff that came off was occasionally something that had not been predicted due to various interactions.

It may well be that newer materials will not have those problems and coated prints will last for hundreds of years. At this point do we really know? As long as coating doesn't decrease the life of a print this is a non-issue. If it is neutral and produces a pleasing effect then it is a plus. If it decreases print life then it is something that has to be factored into its use. Caveat Pictor, if you will.

Roger
  -----Original Message-----
  From: Robert Morrison [mailto:rmorrison@...]
  Sent: Saturday, December 14, 2002 4:08 PM
  To: DigitalBlackandWhiteThePrint@yahoogroups.com
  Subject: Re: [Digital BW] Re: hot dry mounting - possible ?


  On 12/14/02 2:49 PM, "Roger L Sopher" <rlsopher@...> wrote:

  > I would agree with Robert that if one is  worried about "archival" properties
  > then you would want to be able to remove the print from the mat without taking
  > a strong chance of damaging it. On the other hand the "archival" properties of
  > the various coating materials are yet to be proved as well as potential
  > chemical interactions with the pigments, ink receptor coating and paper base.

  I can't speak for Hydrocote...because it is a completely unknown quantity in
  the museum realm, but if you go for the acrylic route these are already
  accepted in museums in the form of acrylic artist's paintings.  The carbon
  black in our ink sets aren't appreciably different than artist's painting
  pigments...so you don't have to worry about an acrylic interacting with the
  pigment based ink sets.  Now dye ink sets may be a whole different story,
  but I don't think that anyone trying to make archival digital prints at this
  point is actually using dyes.

  Robert


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