<BLOCKQUOTE>quote:</font><HR>Originally posted by JackBingham,CPF:
Does anyone know of any matboard company that makes standard paper matboard that meets the following statements?
a. Meets preservation standards.
b. Meets conservation standards.
c. Meets museum standards.
Thanks, Jack<HR></BLOCKQUOTE>
If by standard paper you mean matboard made from wood pulp and buffered with calcium carbonate to make them "acid free" then no, there is no such animal.
There are probably others out there who can give more detail but I'll try to explain the difference in a nutshell. Paper mats are made from wood fiber. When it was a tree, these fibers were held together by a "glue" called lignin. This lignin will remain in the fiber after it becomes paper. The problem comes when this lignin begins breaking down, releasing acidic compounds which will cause the matboard to become brittle, brown along the cut edges, and this acid will destroy the artwork. That's why the brown stains on art are called "acid burn."
Now, the calcium carbonate, which is alkaline, is added during the manufacture of the matboard. This alkaline buffer, which makes the matboard begin life on the alkaline side of the ph scale, will offset some of the acidity as the lignin breaks down. BUT this is only a short-term solution. That matboard will become acidic in a short period of time. You can see the effect at the cut bevel within a year or less.
Matboard made with cotton fibers (ragmat, museum mat, preservation-quality mat, whatever you want to call it) is conservation/preservation quality. Cotton fiber never had any lignin to begin with, so it will not turn acidic, and the long, strong fibers will not break down and become weak. For a demonstration of the difference, look at a piece of paper made in the early 19th century, compared to a piece of newspaper from 3 months ago. The old piece of paper will be in better shape and stronger than the newspaper, which is made from very cheap wood pulp paper.
Just to confuse the issue a little, Alphamats from Bainbridge start life as wood pulp too. The difference comes from the fact that in their manufacturing process, all the lignin is removed from the wood fiber. If I'm not mistaken, the Library of Congress, the de facto arbiter of such things, does approve of them. Die-hard conservatives will say no, only cotton fiber will do, but that's the subject for another heated discussion. Personally, I thing they're fine and great for the vast majority of art we're likely to encounter, but if I were framing something like a first draft of the Gettysburg Address, I'd go with %100 cotton, just to be on the safe side.
IMHO, dump your papermat samples. I mean, you pay maybe 3-4 dollars for a sheet of paper matboard, and maybe 7-8 dollars for rag/Alphamat. Charge fairly, and if you never even consider papermats as an option, it's not a price issue for your customers, because they won't consider it.
I hope this helped and was at least slightly clearer than mud.
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