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Subject: Mold

Mold

From: Luis Crespo <luicre>
Date: Thursday, May 28, 1998
Disinfecting treatments with toxic products that we use at the
Archivo Historico Nacional in Madrid, Spain:

    *   Documents and Books with Microorganism Stains (preventive
        disinfection treatment):

        Options:

        A: Local applying with cotton tips or spraying of a
        dissolution of Ethanol 70% on Water (let dry the documents
        on a well ventilated area).

        B: local applying with cotton tips or sprying of a
        dissolution of Ortho-Phenyl-Phenol (OPP) 0'1% in Ethanol.

    *   Documents with Active Microorganisms (Wet Cellulose):

        Options:

        A: local applying with cotton tips or spraying of a
        dissolution of OPP (1g per each litre of ethanol 70% on
        water).

        B: bath of OPP sodium salt (*highly toxic*) (1g per each
        litre of water).

        C: bath of : 1g OF OPP + 100 ml + 900 ml of water.

        D: enclose the documents or books (*No Parchment nor
        Leather*) into a well-close bag or showcase with
        paraformaldehyde (PF) to sublimate it. Keep the material
        into a room with a temperature above 20 degrees C. Leave the
        material into the bag or showcase 20 days at least.

        Proportions: 3g of PF per 5kg of cellulose

There is another possibility using non toxic products (highly
enriched Nitrogen atmosphere) but it is a bit complex to explain it.
You may seek for information about it at the Getty Institute.

                                  ***
                  Conservation DistList Instance 11:96
                   Distributed: Friday, May 29, 1998
                       Message Id: cdl-11-96-005
                                  ***
Received on Thursday, 28 May, 1998

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