[PADG:1141] Re: Mass Deacidification

["Chandru Shahani" <csha@xxxxxxx>]

Janet,

Laboratory studies suggest that this process is most effective with porous
papers, in which the magnesium oxide particles can penetrate below the
surface of the paper.  Papers which are sized heavily enough to have a very
smooth appearance or finish may not benefit significantly.  At the Library
of Congress, we particularly avoid treating coated and supercalendered
papers.  Treatment of such papers leads to a powdery appearance and feel,
and will be ineffective as well.

Good luck,

Chandru Shahani

----- Original Message -----
From: Janet Gertz <gertz@xxxxxxxxxxxx>
To: <consdist@xxxxxxxxxxxxxxxxxx>; <padg@xxxxxxx>
Sent: Wednesday, January 10, 2001 5:02 PM
Subject: [PADG:1136] Mass Deacidification


> Columbia University Libraries is undertaking a pilot mass
> deacidification project with Preservation Technologies using their
> Bookkeeper process to treat Chinese monographs printed on acidic paper.
>  We also hope to treat Urdu monographs next year.
>
> I would be interested in hearing from other libraries who are
> currently employing mass deacidification, or plan to in the near
> future.  What materials are you treating, and what was your decision
> process in choosing those materials?  Did avoiding duplication with
> other deacidification efforts play a role in your decision?  Do you
> put a note in the 583 field to identify deacidified materials?
>
>
>
>
>
> Janet Gertz
> Director for Preservation
> Columbia University Libraries
> 101c Butler Library
> 535 West 114th Street
> New York, NY 10027
> 212 854-5757
> fax 212-854-3290
> gertz@xxxxxxxxxxxx
>
>