vapor-phase deacidification
A method of deacidifying paper which involves the
use of a material that is capable of supplying the
deacidification agent in the form of a vapor.
Ammonia, diethyl zinc, morpholine, or other
volatile alkaline substances can be used, but most
are not permanent in the presence of high relative
humidity. Another method, and one which has
received considerable notice, involves the use of
cyclohexylamine carbonate. The books are
interleaved with tissue paper impregnated with the
compound, while loose documents may be treated by
placing sacks containing the compound with the
documents in box files. The deacidification agent
is the free amine given off as a vapor. No
alkaline reserve is left in the paper by this
method, and this, along with its disagreeable
(fishy) odor, represent its chief shortcomings.
Some authorities also contend that the vapor is
potentially toxic. See also: BARROW, WILLIAM J. ;
DEACIDIFICATION
;DIETHYL ZINC ;MORPHOLINE ;NON-AQUEOUS
DEACIDIFICATION .
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