Hi John,

I don't know how this would affect either material but how about liquid
nitrogen?    I would think the resin would fracture while the bone would
remain intact, plus it would be easy enough to run a test.


On Thu, Jan 26, 2017 at 2:04 PM, John Dudgeon <[log in to unmask]> wrote:

> I am trying to determine the most conservative method for removing an
> acrylic copolymer dispersion resin, called ACRYSOL WS-24 which has been
> previously sprayed or dipped on archaeological bone specimens, prior to
> preparation for isotope, protein and DNA extraction. Has anyone prepared
> bone specimens previously coated in ACRYSOL and if so, what methods were
> used to remove the polymer without undue alteration of the bone matrix?
> Acetone is one solvent that has previously been described (J. Field
> Archaeology, 1995) as well as unspecified alkaline aqueous preparations
> (Dow Chemical Technical Data Sheet), but I wanted to see if anyone had
> successfully used a strategy that was not unduly deleterious to endogenous
> organic molecules. I imagine the presence of the polymer would affect SI
> determinations, but have not as yet confirmed this from a chemical
> formulation.
> Sincerely,
> John
> --
> John V. Dudgeon, Ph.D.
> Associate Professor, Department of Anthropology
> Director, Center for Archaeology, Materials and Applied Spectroscopy
> ------------------------------------------------------------
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> Idaho State University, 921 S. 8th Avenue, Stop 8005, Pocatello, ID
> 83209-8005
> Phone: (208) 282-3862 - FAX: (208) 282-4944