> It will buffer for a good 2-3 years.
Dario, where did you get this estimate for the effective duration of a
Bookkeeper spraying? I haven't seen any scientific studies of this, and
without same, it's pretty much a guesstimate. Based on my admittedly
limited knowledge of the rate of acid formation in paper and the amount of
buffer laid down by Bookkeeper, I'd guess the effect would be much longer
than 2-3 years.
Of course, as you indirectly point out, what a surface spray doesn't do is
get the buffer deep into the paper substance. Paper may seem thin, but on
a molecular basis, there's a huge middle layer that the suspended buffer
won't reach, even when spraying both front and back.
AZ, there are instructions that come with Bookkeeper indicating how much
to apply. I apply it until the paper appears wet, but not so that there's
visible fluid on the paper surface, if that makes sense.
Another topic we might touch on here is a new technique I've been hearing
of lately that's supposed to be basically like easily-reversible backing.
The poster is deacidified in a bath and mounted on some backing material,
restored, and then the backing is easily removed without damaging the
poster, once it dries. So you get a beautifully restored poster without
visible fold lines and no backing. At least that's the theory. I've heard
this technique called 'starchbacking', which isn't a great name, imho.
Don't know much more about it, but Poster Mountain supposedly now offers
it, and I've heard of other restorers starting to offer this as well.
Anyone have any more details about this? If this catches on in a major
way, I could see traditional linenbacking decreasing in desirability in
the upcoming years.
Randy
Visit the MoPo Mailing List Web Site at www.filmfan.com
___________________________________________________________________
How to UNSUBSCRIBE from the MoPo Mailing List
Send a message addressed to: [EMAIL PROTECTED]
In the BODY of your message type: SIGNOFF MOPO-L
The author of this message is solely responsible for its content.
