Dear Christine,

I am not familiar with any commercial non-aqueous deacidification process
which will not leave an alkaline buffer; indeed, if there is no buffering,
why deacidify? ,  Be that as it may, I do know that
deacidification/buffering is most effective if applied during he first
half-dozen years or so.  Past that time, the useful effect diminishes
rapidly.

Jack

>Date:    Mon, 3 Mar 1997 13:40:20 -0500
>From:    Christine Mouw <[log in to unmask]>
>Subject: gaseous deacidification process
>
>Dear list readers:
>
>I have an opportunity to send some of our works of art on paper to a
>company called Midwest Freeze Dry in Chicago for deacidification.  I
>know that the process is a gaseous deacidification process, that no
>alkaline material is left behind and it is done in a "tank".

-Snip-

>Christine Mouw
>Assistant Curator
>Herbert Hoover Presidential Library-Museum
>West Branch, Iowa  52358
>[log in to unmask]

Jack C. Thompson

Thompson Conservation Lab.
7549 N. Fenwick                               I hear and I forget,
Portland, Oregon  97217                       I see and I remember,
                                              I do and I understand.
www.teleport.com/~tcl/