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Re: Local Oxidation Removal



Dear Pamela,
It sounds as though what you are describing is foxing.  There is a
reasonably complicated protocol for bleaching such spots away, but it is
more optical slight-of-hand than a true solution to the problem.

What happens is that the spots are converted from a colored iron compound
to a colorless iron compound.  It is also further dispersed in the paper.
When the conditions which caused the rust spots to show up in the first
place recur (generally high humidity over a period of time), the foxing can
come back worse than before.

If the spots are not terribly distracting, you would be best off just
leaving it alone, and keep it dry.  That should stop it from getting worse.

If there is a paper conservator in your area, you might talk with that person.

Jack

Jack C. Thompson
Thompson Conservation Laboratory
7549 N. Fenwick
Portland, OR  97217
503/735-3942 (voice/fax)

http://www.teleport.com/~tcl/index.html


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