<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div class="moz-cite-prefix">Dear Sarah,<br>
<br>
it seems that a lot of pressure builds up inside your vials;
temperature increase by 2 degrees can build up 2 bar pressure
insight your vials. If vials are filled up to the top (with little
head space below the lid), pressure might be even higher.<br>
<br>
Check for additional temperature differences in your lab (where
the vials are closed) and the storage area, because temperature
differences between those two areas may be suited to the problem
you oberserve. If you screw a lid on (of put a stopper on an
stopper jar), you trap additional air insight; this additionally
adds to the problem.<br>
<br>
I would try to leave more head space in your vials (which
apparently do have good tight sealings) and to close the vials
under temperatures close to the highest temperatures you observed
in your storage area. <br>
<br>
Tight lids are essential to ensure a stable environment inside
your vial. If you would screw lids down too tight (and the glass
would be too unstable), the necks would crack immediately under
the physic force, but not burst towards the outside (jumping lids,
breaking bottoms, etc.)<br>
<br>
Hope this helps<br>
Dirk <br>
<br>
<br>
Am 11.01.2017 um 14:42 schrieb Sarah K. Huber:<br>
</div>
<blockquote
cite="mid:7CE771B434EF9746B5E88386824839645F2A036A@mboxes.campus.vims.edu"
type="cite">
<style id="owaParaStyle">P {
MARGIN-BOTTOM: 0px; MARGIN-TOP: 0px
}
</style>
<div style="direction: ltr;font-family: Tahoma;color:
#000000;font-size: 10pt;">
<div>
<p>We are having some problems with our glass vials (2-dram,
4-dram, and 6-dram) cracking, breaking, and in some cases
exploding. In one instance the top of the vial snapped and
shot up a few inches in the air about 5 minutes after
sealing the vial (very exciting). However, most vials that
break are found during routine (monthly) checks. In some
cases, the vials have been fine for a year, and then will
break. In other cases, they break a week or two after
fillign. Breakage occurs several ways: a clean break along
the neck, a clean break along the bottom, or spider cracks
along the whole vial. Has anyone else had this problem or
know of a solution (e.g., do we need higher quality glass
vials, are we screwing down the lids too tight, etc.)?</p>
<p> </p>
<p>We use Kimble™ Screw-Thread N-51A Borosilicate Glass Sample
Vials with Closed-Top Black Phenolic Caps with Rubber
Liners. Vials are filled with ethanol (either 70% or 95%)
and larval fishes. Vials are stored in cardboard vial trays
with dividers between vials, and vial trays are stored in
wooden drawers in sealed metal cabinets. The room has
minimal fluctuations in humidity, but can fluctuate in
temperature by about 5 degrees. Once the vials are stored
they are relatively undisturbed, so there is little to no
bumping or moving of the vials.</p>
<p> </p>
<p>Any thoughts or recommendations of other vial manufacturers
would be appreciated.</p>
<p> </p>
<p>Thanks,</p>
<p>Sarah</p>
<p> </p>
<div style="FONT-SIZE: 13px; FONT-FAMILY: Tahoma">
<div style="FONT-SIZE: 13px; FONT-FAMILY: Tahoma">
<div style="FONT-SIZE: 13px; FONT-FAMILY: Tahoma"><font
color="#000000" size="3">
</font>
<div style="FONT-SIZE: 13px; FONT-FAMILY: Tahoma"><font
color="#000000" size="3"><br>
</font><font size="2"><span style="FONT-SIZE: 10pt"><font
size="2"><span style="FONT-SIZE: 10pt"><font
color="#000000" size="3">Sarah K. Huber,
Ph.D.</font><br>
</span></font></span></font><font size="2"><span
style="FONT-SIZE: 10pt"><font size="2"><span
style="FONT-SIZE: 10pt"><font size="2"><span
style="FONT-SIZE: 10pt">Curatorial
Associate, VIMS Nunnally Ichthyology
Collection<br>
</span></font></span></font></span></font><font
size="2"><span style="FONT-SIZE: 10pt">Office
804.684.7104
<span style="FONT-SIZE: 10pt">| Collection
804.684.</span>7285<br>
<a class="moz-txt-link-abbreviated" href="mailto:skhuber@vims.edu">skhuber@vims.edu</a> <font size="2"><span
style="FONT-SIZE: 10pt">| <a class="moz-txt-link-abbreviated" href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.vims.edu&d=CwMD-g&c=-dg2m7zWuuDZ0MUcV7Sdqw&r=CLFZJ3fvGSmDp7xK1dNZfh6uGV_h-8NVlo3fXNoRNzI&m=2tzoOrN6jjCupMbcRkWXINxbnvfG3dLmhuhsnbU_Lqo&s=kxQEzPjRoyo5gvx5r_IX-vVwQ8XvL0eJbzVZpPPAo7g&e=">www.vims.edu</a></span></font></span></font><br>
<font size="2"><span style="FONT-SIZE: 10pt">PO Box
1346 | 1375 Greate Rd., Gloucester Pt., VA 23062</span></font></div>
</div>
</div>
</div>
</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
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="http://mailman.yale.edu/mailman/listinfo/nhcoll-l">http://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="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.spnhc.org&d=CwMD-g&c=-dg2m7zWuuDZ0MUcV7Sdqw&r=CLFZJ3fvGSmDp7xK1dNZfh6uGV_h-8NVlo3fXNoRNzI&m=2tzoOrN6jjCupMbcRkWXINxbnvfG3dLmhuhsnbU_Lqo&s=aUVxiBAjuZxFrtUdiikY_YgGf2wxuOqpgl44ctpA_gc&e=">http://www.spnhc.org</a> for membership information.
Advertising on NH-COLL-L is inappropriate.
</pre>
</blockquote>
<br>
<p><br>
</p>
<pre class="moz-signature" cols="72">--
Dirk Neumann
Tel: 089 / 8107-111
Fax: 089 / 8107-300
email: Dirk.Neumann(a)zsm.mwn.de
Postanschrift:
Staatliche Naturwissenschaftliche Sammlungen Bayerns
Zoologische Staatssammlung München
Dirk Neumann, Sektion Ichthyologie / DNA-Labor
Münchhausenstr. 21
81247 München
Besuchen Sie unsere Sammlung:
<a class="moz-txt-link-freetext" href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.zsm.mwn.de_ich_&d=CwMD-g&c=-dg2m7zWuuDZ0MUcV7Sdqw&r=CLFZJ3fvGSmDp7xK1dNZfh6uGV_h-8NVlo3fXNoRNzI&m=2tzoOrN6jjCupMbcRkWXINxbnvfG3dLmhuhsnbU_Lqo&s=wEL8l7SVC3O9LVlMVAnPrr-1XSlwTOTkMNSZk9GR4kI&e=">http://www.zsm.mwn.de/ich/</a>
---------
Dirk Neumann
Tel: +49-89-8107-111
Fax: +49-89-8107-300
email: Dirk.Neumann(a)zsm.mwn.de
postal address:
Bavarian Natural History Collections
The Bavarian State Collection of Zoology
Dirk Neumann, Section Ichthyology / DNA-Lab
Muenchhausenstr. 21
81247 Munich (Germany)
Visit our section at:
<a class="moz-txt-link-freetext" href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.zsm.mwn.de_ich_&d=CwMD-g&c=-dg2m7zWuuDZ0MUcV7Sdqw&r=CLFZJ3fvGSmDp7xK1dNZfh6uGV_h-8NVlo3fXNoRNzI&m=2tzoOrN6jjCupMbcRkWXINxbnvfG3dLmhuhsnbU_Lqo&s=wEL8l7SVC3O9LVlMVAnPrr-1XSlwTOTkMNSZk9GR4kI&e=">http://www.zsm.mwn.de/ich/</a>
</pre>
</body>
</html>