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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi Rebecca,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">I see that Rob beat me with a great response on light fading of herbariums specimens on exhibit. I will follow up with how we display herbarium specimens today at the Canadian Museum of Nature.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">There really is no “safe” way to display plant specimens on exhibit. Especially when dealing with long term display.
</span>At the Canadian Museum of Nature, we only display specimens from our herbarium for short temporary exhibitions. We have done Microfade testing in the past to help us recommend safe light levels and length of display for some of our specimens. Our conclusion
was that plant specimens from our collections are not to be used for any long-term exhibitions. We use two solutions for displaying plant specimens in permanent or long-term exhibitions.
<o:p></o:p></p>
<p class="MsoNormal">1) we collect and prepare specimens specifically for the exhibition. We also have back up plants for replacement if there is any fading over time.
<o:p></o:p></p>
<p class="MsoNormal">2) for the display the display of specific herbarium specimens from our collection (historic, type specimens, etc.), we have started to use prints of the herbarium sheets. We use high quality scans and printing to create very realistic
herbarium sheet prints for display (they look like the real thing when on display). The exhibit clearly identifies the herbarium sheets as prints on the display labels.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">These two options help us display more herbarium specimens without the risk of loss of colour and value to the specimens from our collections.<o:p></o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Luci<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:12.0pt;font-family:"Comic Sans MS";color:#0070C0">Luci Cipera</span></b><span lang="EN-US" style="font-size:12.0pt;font-family:"Comic Sans MS";color:#0070C0"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:black">Conservator, Collection Services and Information Management<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:black">Conservatrice-restauratrice, Service des collections et gestion de l’information<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><b><span lang="EN-US" style="font-size:12.0pt;color:black">Canadian Museum of Nature / Mus</span></b><b><span lang="FR" style="font-size:12.0pt;color:black">é</span></b><b><span lang="EN-US" style="font-size:12.0pt;color:black">e
canadien de la nature</span></b><b><span lang="EN-US" style="font-size:12.0pt"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-US" style="color:black">613-364-4079<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:black"><a href="mailto:lcipera@nature.ca">lcipera@nature.ca</a><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Robert Waller <rw@protectheritage.com>; Hawkins, Rebecca Keanni <rebecca.hawkins@ku.edu>; nhcoll-l@mailman.yale.edu<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Nhcoll-l <nhcoll-l-bounces@mailman.yale.edu>
<b>On Behalf Of </b>Robert Waller<br>
<b>Sent:</b> Monday, March 7, 2022 11:59 AM<br>
<b>To:</b> Hawkins, Rebecca Keanni <rebecca.hawkins@ku.edu>; nhcoll-l@mailman.yale.edu<br>
<b>Subject:</b> [EXT]Re: [Nhcoll-l] How to display herbarium specimens without color fading<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="color:red">COURRIEL EXTERNE. Ne cliquez sur aucun lien ou pièce jointe à moins que vous ne connaissiez l'expéditeur.</span>
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<p class="MsoNormal"><span style="color:black;mso-fareast-language:EN-US">Hi Rebecca,</span><span style="mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Always good to try some informal experiments. Indeed, it is not surprising that filtering UV would not reduce fading rate. It is interesting to compare how chlorophyll “sees” light with how people
see light (see, for example, <a href="https://www.demegrow.com/blogs/research/70623171-what-plants-see-separating-lumens-from-effective-par-epar">
https://www.demegrow.com/blogs/research/70623171-what-plants-see-separating-lumens-from-effective-par-epar</a>)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">In a broad Getty Conservation Institute study (attached) removing oxygen during exposure led to a 10 to 20 times reduction in discoloration of herbarium specimens provided by the Canadian Museum
of Nature. That seems like a pretty good reduction but, when you think about it, that just changes the lifetime on exhibit from a few months to a few years. Strategies to limit light levels and exposure times would help and I can imagine some other strategies
to reduce loss in value (perhaps protecting a part of the specimen from light would reduce the loss of value by keeping that part unaltered). I think that would be interesting to discuss with curators, researchers, and other collection users but I think we
do best to consider display of herbarium specimens a consumptive use of the color of those specimens.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Rob</span><o:p></o:p></p>
<p class="MsoNormal"><span style="color:black">Robert Waller, PhD, CAPC, FIIC<br>
President and Senior Risk Analyst<br>
Protect Heritage Corp.<br>
622 Simoneau Way<br>
Ottawa ON K4A 1P4<br>
email: </span><span style="color:#0563C1"><a href="mailto:rw@protectheritage.com">rw@protectheritage.com</a></span><span lang="EN-US" style="color:black"><br>
</span><span style="color:black">internet: </span><span lang="EN-US" style="color:black"><a href="http://www.protectheritage.com/"><span lang="EN-CA">www.protectheritage.com</span></a><br>
</span><span style="color:black">phone: 613-883-2707 (Canada)<br>
phone: 303-872-9739 (USA)<br>
</span><span lang="EN-US" style="color:black"><img border="0" width="16" height="16" style="width:.1666in;height:.1666in" id="Picture_x0020_1" src="cid:image001.gif@01D83223.3D188190"></span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#494A4C;background:white"><a href="http://orcid.org/0000-0002-9500-4113">http://orcid.org/0000-0002-9500-4113</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">skype: rrwaller<o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="color:black">and, </span></i><span style="color:black">Research Associate, Canadian Museum of Nature<br>
<i>and,</i> Adjunct Assistant Professor, Queen’s University<br>
<img border="0" width="85" height="30" style="width:.8819in;height:.3125in" id="Picture_x0020_5" src="cid:image002.jpg@01D83223.3D188190" alt="iic_fellowship_logo_2019">
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Nhcoll-l <<a href="mailto:nhcoll-l-bounces@mailman.yale.edu">nhcoll-l-bounces@mailman.yale.edu</a>>
<b>On Behalf Of </b>Hawkins, Rebecca Keanni<br>
<b>Sent:</b> March 5, 2022 5:11 PM<br>
<b>To:</b> <a href="mailto:nhcoll-l@mailman.yale.edu">nhcoll-l@mailman.yale.edu</a><br>
<b>Subject:</b> [Nhcoll-l] How to display herbarium specimens without color fading<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Hello everyone,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Is there a way to display herbarium specimens without color fading? As I understand it, exposing an herbarium specimen to sunlight (and maybe even artificial light?) will cause the specimen's colors
to fade to various shades of brown. This question isn't for any specific project or exhibition, just something I've been curious about ever since I helped an herbarium make a small university display and its specimens turned brown after a few months of summer
sun.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">I did try an informal experiment where I put an herbarium specimen in a glass picture frame with UV blocking window film. However, the specimen's color faded just as fast as a control specimen
without the film. This suggests that there was fault with the film itself or my application of it, or even that UV light alone is not what is causing the color of herbarium specimens to fade.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Any ideas? Thanks!<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Rebecca Hawkins (she/her)<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">M.A. Student in Museum Studies<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">University of Kansas<o:p></o:p></span></p>
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