Amberlite 4400 OH

Ingeborg Laanbroek <i.laanbroek<-at->gmail<.>com> writes

>A couple of months ago I came across ion exchange resin, Amberlite
>4400 OH, during an internship in Berlin.  There was little
>literature about it and hardly anybody has heard of the material.
>Does anybody know this material or a different version?  What are
>the pro's and con's of the material?

Amberjet 4400 is a strongly basic anion exchange resin based on
cross-linked polystyrene.  It's been replaced by Amberjet 4500, and
is used for water purification.  In that application it's usually
used with strongly acidic cation exchange resins in mixed beds.

I've used Amberlite IR120, which is a strongly acidic cation
exchange resin based on sulfonated polystyrene.  It's also used for
water purification, but I used it for removing carbonate crusts from
lead objects that still had substantial metal mass.  The treatment
has to be monitored closely and stopped once the object surface is
cleaned. The method is described in The Conservation of Antiquities
and Works of Art, by Plenderleith and Werner, 2nd edition 1971.

What was the 4400 OH being used for in a conservation context?

Paul S. Storch
Project Specialist III /Sites Collections and Exhibits Liaison
Facilities-Historic Properties Department
Facilities and Risk Management Division
Minnesota Historical Society
345 Kellogg Blvd. West
Saint Paul MN 55102-1906
651-259-3257


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                  Conservation DistList Instance 29:1
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