This is great. What is your opinion of the Bizot Green Protocol? It is the standard that I have heard referenced in regards to this issue.
https://www.cimam.org/sustainability-and-ecology-museum-practice/bizot-green-protocol/
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Douglas Flandro
Exhibit Designer
CambridgeSeven Associates, Inc.
Cambridge MA
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Original Message:
Sent: 03-22-2023 12:31 PM
From: Bruce MacLeish
Subject: Considerations for broadening museum climate requirements
As has been observed earlier on this forum, some museum policies have adhered for decades to strict, narrow, "gold standard" environmental boundaries especially pertaining to the lending of art works; this narrow view was reported in the New York Times not long ago, without consideration for the very large body of work developed over many years that examines what environmental conditions actually make sense, and why.
It should be noted that for decades, conservators, scientists, and museum collections specialists have been exploring how museum environmental parameters can be broadened. A huge amount of this vital information is available on the web, perhaps unknown to the New York Times.
As environmental parameters are broadened, a more individualized approach is needed to protect the most sensitive objects. Some will require specialized environments or narrower ranges of temperature and relative humidity. With these considerations in mind-along with concerns about energy consumption, the global economic downturn and stewardship of natural resources-the AIC's (American Institute for Conservation) Environmental Guidelines Working Group developed the following interim guidelines, which were presented at last June's AAMD (American Association of Museum Directors) meeting:
For the majority of cultural materials, a set point in the range of 45–55% relative humidity with an allowable drift of +/-5%, yielding a total annual range of 40% minimum to 60% maximum and a temperature range of 59–77°F, is acceptable.
• Fluctuations must be minimized.
• Some cultural materials require different environmental conditions for their preservation.
• Loan requirements for all objects should be determined in consultation with conservation professionals.
Here is one of the best references from CCI (Canadian Conservation Institute), but even they continue to rearrange their online information web pages. They are now under Canada.ca. This article summarizes the current ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) Chapter 24:
https://www.canada.ca/en/conservation-institute/services/preventive-conservation/environmental-guidelines-museums.html
Jennie Baker and Richard Kerschner wrote this bibliography back in 1998 under contract to the Getty citing work back to the 1970's.
https://cool.culturalheritage.org/byauth/kerschner/ccbiblio.html
Also of considerable importance is Richard Kerschner's paper , published by the Getty in 2007: https://www.getty.edu/conservation/our_projects/science/climate/paper_kerschner.pdf
By all means, let us continue to research and educate in our field, while recognizing and making good use of all the available resources.
A. Bruce MacLeish
Curator Emeritus, Newport Restoration Foundation
85 Lake Street
Cooperstown, NY 13326