<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<div class="moz-cite-prefix">Dear Esther,</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">as these are structural damages of the bone matrix (i.e. fracture of the fin-bearing caudal fin-ray bones), these can hardly be "repaired". Moreover, with weak specimens from the 19th century, I would be careful with the tissue
matrix (as the cell membranes usually are already weak or even damaged. Exposing these membranes to higher concentrated alcohol or other chemicals could increase the osmotic damage.</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">It would be worth considering to stabilise and protect the caudal fin with a densely woven, fine fabric, that is added to the specimen independently from the wrapping. You can also consider to stabilise the wrapping by adding some
slim PE-cushioning in the outer layers of the wrapping (e.g. parts of the thick PE-foil you use for sealing the specimens - the foil is not too rigid and would not introduce additional risks of mechanical damage of the caudal fin.</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">For storage while on loan, you could consider to send more of "your" alcohol along with the loan (you can add 30ml pre welding and 1.0 l total alcohol volume under A189).</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">Hope this helps</div>
<div class="moz-cite-prefix">Dirk </div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">Am 25.11.2025 um 14:13 schrieb Esther Dondorp:</div>
<blockquote type="cite" cite="mid:CAGaR2xc7-A6T-XbWt4rbBttoB2o4cjDbi_BiePOZHXyNwved6Q@mail.gmail.com">
<div>
<div dir="ltr">
<div>Dear colleagues,</div>
<div><br>
</div>
<div>Does anyone have experience with the restoration or consolidation of fluid-preserved specimens, in this case specifically partially torn caudal fins of 19th-century fish preserved in ethanol? The goal is to stabilize the specimen so it can be sent out
on a museum loan. <br>
Is restoration in such a case even possible? If so, would introducing any materials or chemicals risk causing unwanted reactions within the preservation fluid?</div>
<div><br>
Are there alternative methods that do not involve adhesives or similar substances? </div>
<div><br>
</div>
<div>
<div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature">
<div>
<div>
<div><span style="font-size:13.3333px">Many thanks!</span><br>
<br>
<span style="font-size:10pt">Esther Dondorp</span></div>
<div><span style="font-size:10pt">Senior Collectiebeheerder</span></div>
<div><span style="font-family:arial,helvetica,sans-serif"><a title="Naturalis-logo" href="https://naturalis-public-media-assets.s3.eu-central-1.amazonaws.com/Naturalis-mail-signature/logo.png" rel="noopener" target="_blank" moz-do-not-send="true"><img style="float:left;width:160px;height:82px" src="https://naturalis-public-media-assets.s3.eu-central-1.amazonaws.com/Naturalis-mail-signature/logo.png" moz-do-not-send="true"></a></span></div>
<p><br>
<br>
<br>
<br>
<br>
<span style="font-size:8pt"><sub>+31648704107 - +31648704107</sub></span><br>
<span style="font-size:8pt"><sub><a href="mailto:esther.dondorp@naturalis.nl" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">esther.dondorp@naturalis.nl</a> - <a href="https://www.naturalis.nl/" target="_blank" moz-do-not-send="true">www.naturalis.nl</a></sub></span><br>
<span style="font-size:8pt"><sub>Darwinweg 2, 2333 CR Leiden</sub></span><br>
<span style="font-size:8pt"><sub>Postbus 9517, 2300 RA Leiden</sub></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre wrap="" class="moz-quote-pre">_______________________________________________
Nhcoll-l mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Nhcoll-l@mailman.yale.edu">Nhcoll-l@mailman.yale.edu</a>
<a class="moz-txt-link-freetext" href="https://mailman.yale.edu/mailman/listinfo/nhcoll-l">https://mailman.yale.edu/mailman/listinfo/nhcoll-l</a>
_______________________________________________
NHCOLL-L is brought to you by the Society for the Preservation of
Natural History Collections (SPNHC), an international society whose
mission is to improve the preservation, conservation and management of
natural history collections to ensure their continuing value to
society. See <a class="moz-txt-link-freetext" href="http://www.spnhc.org">http://www.spnhc.org</a> for membership information.
Advertising on NH-COLL-L is inappropriate.
</pre>
</blockquote>
<p><br>
</p>
<div class="moz-signature">-- <br>
<meta name="Generator" content="Microsoft Word 15 (filtered)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:"Source Sans Pro";
panose-1:2 11 5 3 3 4 3 2 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin-top:0cm;
margin-right:0cm;
margin-bottom:8.0pt;
margin-left:0cm;
line-height:107%;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:#954F72;
text-decoration:underline;}
.MsoChpDefault
{font-family:"Calibri",sans-serif;}
.MsoPapDefault
{margin-bottom:8.0pt;
line-height:107%;}
@page WordSection1
{size:595.3pt 841.9pt;
margin:70.85pt 70.85pt 2.0cm 70.85pt;}
div.WordSection1
{page:WordSection1;}
-->
</style>
<div class="WordSection1">
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
normal">
<b><span lang="EN-US" style="font-family:"Source Sans Pro",sans-serif">****</span></b></p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
normal">
<b><span lang="EN-US" style="font-family:"Source Sans Pro",sans-serif"> </span></b></p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
normal">
<b><span lang="EN-US" style="font-family:"Source Sans Pro",sans-serif">Dirk Neumann</span></b></p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
normal">
<span lang="EN-US" style="font-family:"Source Sans Pro",sans-serif">Collection Manager, Hamburg</span></p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
normal">
<span lang="EN-US" style="font-family:"Source Sans Pro",sans-serif"> </span></p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
normal">
<span lang="EN-US" style="font-family:"Source Sans Pro",sans-serif">Postal address:</span></p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
normal">
<b><span lang="EN-US" style="font-family:"Source Sans Pro",sans-serif">Museum of Nature Hamburg</span></b><span lang="EN-US" style="font-family:"Source Sans Pro",sans-serif"><br>
</span><span lang="EN-US" style="font-family:"Source Sans Pro",sans-serif;
color:#008669">Leibniz Institute for the Analysis</span></p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
normal">
<span style="font-family:"Source Sans Pro",sans-serif;color:#008669">of Biodiversity Change</span></p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
normal">
<span style="font-family:"Source Sans Pro",sans-serif">Dirk Neumann</span></p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
normal">
<span style="font-family:"Source Sans Pro",sans-serif">Martin-Luther-King-Platz 3</span></p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
normal">
<span style="font-family:"Source Sans Pro",sans-serif">20146</span><span style="font-family:"Source Sans Pro",sans-serif">
</span><span style="font-family:"Source Sans Pro",sans-serif">Hamburg</span><span style="font-family:"Source Sans Pro",sans-serif"><br>
+49 </span><span style="font-family:"Source Sans Pro",sans-serif">40</span><span style="font-family:"Source Sans Pro",sans-serif">
</span><span style="font-family:"Source Sans Pro",sans-serif">238 3</span><span style="font-family:"Source Sans Pro",sans-serif">17 –
</span><span style="font-family:"Source Sans Pro",sans-serif">628</span></p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
normal">
<u><span style="font-family:"Source Sans Pro",sans-serif;color:blue"><a href="mailto:d.neumann@leibniz-lib.de" class="moz-txt-link-freetext">d.neumann@leibniz-lib.de</a></span></u></p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
normal">
<a href="imap://dneumann@webmail.leibniz-lib.de:993/fetch%3EUID%3E/INBOX/Privat/www.leibniz-lib.de"><span style="font-family:"Source Sans Pro",sans-serif">www.leibniz-lib.de</span></a></p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
normal">
<span style="font-size:10.0pt;font-family:"Source Sans Pro",sans-serif"> </span></p>
<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:
normal">
<span style="font-size:10.0pt;font-family:"Source Sans Pro",sans-serif">-- <br>
Stiftung Leibniz-Institut zur Analyse des Biodiversitätswandels<br>
Postanschrift: Adenauerallee 127, 53113 Bonn, Germany<br>
<br>
Stiftung des öffentlichen Rechts;<br>
Generaldirektion: Prof. Dr. Bernhard Misof (Generaldirektor), Adrian Grüter (Kaufm. Geschäftsführer)<br>
Sitz der Stiftung: Adenauerallee 160 in Bonn<br>
Vorsitzender des Stiftungsrates: Dr. Michael Wappelhorst</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;line-height:107%;font-family:
"Source Sans Pro",sans-serif"> </span></p>
</div>
</div>
-- <br>
Stiftung Leibniz-Institut zur Analyse des Biodiversitätswandels<br>
Postanschrift: Adenauerallee 127, 53113 Bonn, Germany<br>
<br>
Stiftung des öffentlichen Rechts;<br>
Generaldirektion: Prof. Dr. Bernhard Misof (Generaldirektor), Adrian Grüter (Kaufm. Geschäftsführer)<br>
Sitz der Stiftung: Adenauerallee 160 in Bonn<br>
Vorsitzender des Stiftungsrates: Dr. Michael H. Wappelhorst<br>
</body>
</html>