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Subject: Marker for PEG

Marker for PEG

From: Ellen Carrlee <ellen_carrlee>
Date: Thursday, February 8, 2007
Karin Abelskamp <k.abelskamp [at] archeologie__nl> writes

>Currently, ArchaeoSpecialists is carrying out experiments in
>impregnating wood with PEG. To determine the extent of impregnation,
>we would like to "mark" the PEG (4000) solution to make the PEG
>easily recognized within the object after treatment (after
>cross-section). I can imagine that this has been done before. Does
>anyone have experience with the use of markers for this purpose?
>What type did you use and why?


    Gregory S. Young and Ian N.M. Wainwright at the Canadian
    Conservation Institute.

    "Polyethylene Glycol Treatment for Waterlogged Wood at the Cell
    Level" Proceedings of the ICOM Waterlogged Wood Working Group
    Conference Ottawa 1981. Page 107-116

       "... for PEG determination in wood, cobalt thiocyanate is a
        microscopical stain when dissolved in non-aqueous
        histological grade cedarwood oil.  The oil (cedrene and
        cedrol) is immiscible with both water and PEG .  It
        dissolves the cobalt thiocyanate, but readily gives it up to
        the PEG in wood sections."

Hope that helps,

Ellen Carrlee
Alaska State Museum
395 Whittier Street
Juneau, AK 99801

                  Conservation DistList Instance 20:41
                 Distributed: Sunday, February 25, 2007
                       Message Id: cdl-20-41-006
Received on Thursday, 8 February, 2007

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