<div dir="ltr"><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">Thank you EVERYONE for the excellent information and suggestions. </div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif"><br></div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">These lids are old and could be part of the 'bad batch' mentioned, or they were likely exposed to some UV prior to the new facility. And yes - the light. That is a fantastic point I didn't even consider. It would have taken me months to run all this down in the literature....whew. What a relief to get your suggestions.</div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif"><br></div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">I'm sort of on an island at my Uni as a curator in my position so ...this is an amazing, and super helpful, community. You all ROCK ! </div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif"><br></div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">I have a clear path forward and truly appreciate your help, guidance, and taking the time to reply.</div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif"><br></div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">thanks</div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">lm</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Mar 8, 2024 at 1:18 PM Bentley, Andrew Charles <<a href="mailto:abentley@ku.edu">abentley@ku.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg-7674848852008415509">
<div lang="EN-US" style="overflow-wrap: break-word;">
<div class="m_-2010955906127787045WordSection1">
<p class="MsoNormal"><span style="font-size:11pt">Hey Lance<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt">Great info provided by both John and Rob. I would add from our experience with the same lids from Kols/O’Berk that we are not seeing systematic failures with these lids but random replacements over time.
We have not noticed any greater number of failures on higher shelves but do have either LED or UV shielded fluorescent lights throughout our facility. I just undertook a full inventory of our collection to top off alcohol levels and check lids and would say
that there was less than a 10-15% failure rate and it was limited almost exclusively to 8oz jar lids and mostly the unlipped variety (see below).<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt">One thing we have noticed is a higher rate of failure with a specific type of lid that was shipped from Kols some time back (the right hand kind in the attached image that does not have a outer lip to the
lid) where the lid will crack along the edge when tightened). We have now started ensuring that we get the left hand kind whenever we order lids from Kols. They only seem to come in the 58mm size for 8oz jars so the damage is limited.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt">The lids we have are stamped with MRP below the internal gasket material. In looking on the MRP Plastics website, these are polypropylene lids while the inserts are polyethylene (F217 -
<a href="https://www.oberk.com/closures/continuous-thread-caps-(ct)/plastic-ct-closure/58400ov--58--400-bla-pp-rib-matte-cap-f217-lnr" target="_blank">
https://www.oberk.com/closures/continuous-thread-caps-(ct)/plastic-ct-closure/58400ov--58--400-bla-pp-rib-matte-cap-f217-lnr</a>).<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><i><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(0,29,53);background:white">F217 inserts are a type of polyethylene foam liner that can be used with metal, plastic, or glass. They are made of three layers: a thin foam
core sandwiched between two layers of LDPE film. F217 liners are odor resistant and pulp dust free, and have good chemical resistance and a low transmission rate. They also have a low moisture transmission rate, meaning they prevent moisture from entering
the bottle and affecting products.</span></i><i><span style="font-size:11pt;font-family:Calibri,sans-serif"><u></u><u></u></span></i></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt">I would concur with John and Rob that you should check your light sources for UV emissions while also motivating for lights to be off at all times when the space is unoccupied – motion sensitive lights are
a great idea.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt">Hope that helps<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt">Andy<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="font-size:11pt"> A : A : A :<br>
}<(((_°>.,.,.,.}<(((_°>.,.,.,.}<)))_°><br>
V V V<br>
Andy Bentley<br>
Ichthyology Collection Manager<br>
University of Kansas<br>
Biodiversity Institute<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="font-size:11pt">Dyche Hall<br>
<a><span style="color:rgb(5,99,193)">1345 Jayhawk Boulevard</span></a><br>
<a><span style="color:rgb(5,99,193)">Lawrence, KS, 66045-7561</span></a><br>
<a><span style="color:rgb(5,99,193)">USA</span></a><br>
<br>
Tel: <a href="tel:%28785%29%20864-3863" target="_blank"><span style="color:rgb(5,99,193)">(785) 864-3863</span></a><br>
Fax: <a href="tel:%28785%29%20864-5335" target="_blank"><span style="color:rgb(5,99,193)">(785) 864-5335</span></a> <br>
Email: <a href="mailto:abentley@ku.edu" target="_blank"><span style="color:rgb(5,99,193)">abentley@ku.edu</span></a> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt">ORCID: </span><span style="font-size:11pt;color:rgb(73,74,76);background:white"><a href="https://orcid.org/0000-0002-3093-1258" target="_blank"><span style="color:rgb(5,99,193)">https://orcid.org/0000-0002-3093-1258</span></a><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-AU" style="font-size:11pt"><a href="http://ichthyology.biodiversity.ku.edu/" target="_blank"><span style="color:rgb(5,99,193)">http://ichthyology.biodiversity.ku.edu</span></a></span><span style="font-size:11pt"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"> A : A : A :<br>
}<(((_°>.,.,.,.}<(((_°>.,.,.,.}<)))_°><br>
V V V<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class="MsoNormal"><b><span style="font-size:11pt;font-family:Calibri,sans-serif">From:</span></b><span style="font-size:11pt;font-family:Calibri,sans-serif"> Nhcoll-l <<a href="mailto:nhcoll-l-bounces@mailman.yale.edu" target="_blank">nhcoll-l-bounces@mailman.yale.edu</a>>
<b>On Behalf Of </b>Lance McBrayer<br>
<b>Sent:</b> Friday, March 8, 2024 9:42 AM<br>
<b>To:</b> NHCOLL-new <<a href="mailto:nhcoll-l@mailman.yale.edu" target="_blank">nhcoll-l@mailman.yale.edu</a>><br>
<b>Subject:</b> [Nhcoll-l] Failure of plastic lids in ethanol collections<u></u><u></u></span></p>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<div>
<p class="MsoNormal"><span style="font-family:"Trebuchet MS",sans-serif">Greetings<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Trebuchet MS",sans-serif">I have noticed a systematic failure of plastic lids on the top shelves of our wet collection. The plastic is drying and cracking, or crumbling if the lid is pressed in the middle. Luckily
I noticed this and only had 3 specimens dry out. But, I'm learning the problem is widespread, particularly on the top shelf.<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Trebuchet MS",sans-serif"><u></u> <u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Trebuchet MS",sans-serif">These lids were replaced in about 2010, and since 2013 been have been kept in a new storage facility with a consistent temp in the 60-69 degree F range. <u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Trebuchet MS",sans-serif"><u></u> <u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Trebuchet MS",sans-serif">The facility has shock-proof LED lighting that was
<i><u>supposed to</u></i> emit little to no UV radiation.<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Trebuchet MS",sans-serif"><u></u> <u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Trebuchet MS",sans-serif">I suspect the lighting is in fact emitting UV. The problem is much less common on the lower shelving racks where they are 'shaded' by jars above. I have also guessed there may be a known
'lifespan' for plastic lids. I bought the lids from O Berk like many collections do in the USA.<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Trebuchet MS",sans-serif"> Is anyone aware of this problem<span class="m_-2010955906127787045gmaildefault">? That is:</span></span><u></u><u></u></p>
</div>
<div>
<div>
<p class="MsoNormal"><span style="font-family:"Trebuchet MS",sans-serif">1 - What have others experienced as the lifespan of plastic lids on specimens in 70% ethanol?<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Trebuchet MS",sans-serif">2 - Does anyone have suggestions as to how to remedy a UV light issue? There are no windows in the facility. BUT, the safety officer INSISTED on having 2 lights on in the room at all
times in case some was in the room and the lights were turned off. I protested, but lost. I think it is time to revisit...?<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Trebuchet MS",sans-serif"><u></u> <u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Trebuchet MS",sans-serif">Any advice forward is welcomed...<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Trebuchet MS",sans-serif">Thanks<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Trebuchet MS",sans-serif">lm<u></u><u></u></span></p>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<p class="MsoNormal"><span class="m_-2010955906127787045gmailsignatureprefix">-- </span><u></u><u></u></p>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p class="MsoNormal"><span style="font-size:10pt;font-family:"Times New Roman",serif">Lance McBrayer</span><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Times New Roman",serif">Professor & Curator of Herpetology</span><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Times New Roman",serif">Department of Biology</span><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10pt;font-family:"Times New Roman",serif">Georgia Southern University</span><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10pt;font-family:"Times New Roman",serif">TEL: 912.478.0545</span><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u><span style="font-size:7.5pt;font-family:"Times New Roman",serif;color:rgb(0,0,238)"><a href="https://sites.google.com/a/georgiasouthern.edu/lance-d-mcbrayer/" target="_blank">Webpage</a></span></u><u></u><u></u></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div></blockquote></div><br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><font face="'times new roman', serif"><span style="font-size:x-small">Lance McBrayer</span></font></div><div><font face="times new roman, serif" size="1">Professor & Curator of Herpetology</font></div><div><font face="times new roman, serif" size="1">Department of Biology</font></div><div><span style="font-size:x-small;font-family:"times new roman",serif">Georgia Southern University</span><br></div><div><span style="font-size:x-small;font-family:"times new roman",serif">TEL: 912.478.0545</span><br></div><div><font color="#0000ee" face="times new roman, serif" size="1"><u><a href="https://sites.google.com/a/georgiasouthern.edu/lance-d-mcbrayer/" target="_blank">Webpage</a></u></font></div></div></div></div></div></div></div></div></div>