[Nhcoll-l] thoughts on "Pyrite Stop" product?

[Baars, Christian]

Hi Dee,

I am trying again because, apparently, my response is being held by the moderator due to exceeding the permissible file size - I had attached some references but will replace these with links now.

I had not yet heard of this product but it appears to be ethanolamine thioglycolate which is based on a treatment described by Lorraine Cornish (https://www.palass.org/sites/default/files/media/publications/palaeontology/volume_27/vol27_part2_pp421-424.pdf, ). This treatment is still in use today, although alternatives exist (e.g., ammonia - https://www.natsca.org/article/85).

In this context a new publication (https://www.tandfonline.com/doi/full/10.1080/00393630.2021.2015947) may provide some answers on preventing damage to mineral and other geological specimens to avoid having to subject them to treatment - although this won't save them from historic damage of course, nor resolve the issues you mention if environmental control is not currently ideal. But treating specimens and then placing them in the same poor environments has considerable resource implications.

Best regards
Christian


Dr Christian Baars AMA ACR
Head of Collections Care

National Museums Liverpool
Conservation Centre
Midland Railway Building
1 Peter Street
Liverpool L1 6BL
Telephone: 07738 056638

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Dr Christian Baars
Baars, Christian
Head of Collections Care
Collections Care
0151 478

liverpoolmuseums.org.uk
@nml_muse
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Baars, Christian
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From: Nhcoll-l <nhcoll-l-bounces at mailman.yale.edu> On Behalf Of Dee Stubbs-Lee
Sent: 03 February 2022 14:04
To: nhcoll-l at mailman.yale.edu
Subject: [Nhcoll-l] thoughts on "Pyrite Stop" product?

Apologies for cross posting.

A colleague in our Geology and Palaeontology section has asked my opinion on a new product that has come to his attention that is being marketed as preventing or correcting pyrite disease (www.zoicpalaeotech.co.uk/products/pyrite-stop<https://www.zoicpalaeotech.co.uk/products/pyrite-stop>). As my experience with mineralogical collections is quite limited, I would like to get thoughts from colleagues on the listserv about the product's suitability for use with pyritic materials in museum mineralogical collections, particularly where both environmental control in collections storage and laboratory ventilation are sub-optimal.

Thank you,
Dee


Dee A. Stubbs-Lee, MA, CAPC
Conservator / Restauratrice
New Brunswick Museum
277 Douglas Avenue
Saint John, New Brunswick
E2K 1E5
Canada

(506) 643-2341

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