[Nhcoll-l] Blue Matrices

[ELLEN PEARLSTEIN]

This looks like it could be fire smudging, areas of reduction where the
sherds came close to a strong heat source, usually during firing. I am
wondering if the donor has earlier images of these sherds where these
"stains" are not present?

All best,
Ellen Pearlstein
Professor

UCLA Information Studies
230 GSEIS
Los Angeles, CA 90095

UCLA/Getty Program in the Conservation of Archaeological and Ethnographic
Materials
A 410 Fowler
Los Angeles, CA 90095

epearl at ucla.edu
Editor, Conservation of featherwork from Central and South America
https://www.archetype.co.uk/publication-details.php?id=245

PI, Andrew W. Mellon Opportunity for Diversity in Conservation
http://conservation.ucla.edu/Mellon_diversity_opportunity
https://www.instagram.com/uclagettydiversityconservation/?hl=en


On Thu, Oct 11, 2018 at 11:28 AM Katie McEvoy <katieimcevoy at gmail.com>
wrote:

> Recently the museum I work at received a donation of fossils with matrices
> that have turned blue . The donor has said that they were stored in a dark,
> dry basement in paper towel/plain newsprint and were not treated with
> anything. Some of it looks like accretion while some of it appears to be
> the matrix itself and they do not fluoresce under short or long wave UV
> light.
>
> Has anyone seen this before or know what may have caused it?
>
> Pictures attached.
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