<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">Hi Claire,<div class=""><br class=""></div><div class="">This is a term rarely used nowadays and usually refers to a specimen that has specifically been fixed in a mixture such has Heidenhain’s Susa fixative which contains mercuric chloride, formalin, acetic acid and sodium chloride (likely as a buffer).. It’s been a while since I last used this (c. 1973) so am slightly vague but this was used as a triple fixative on the histology course that I took from 1971-1973. Basically a mix of a primary fixative (formalin) and two secondary fixatives (such as picric acid, potassium dichromate, even cobalt nitrate - as in Bouin, Zenker, Helly, Da Fano’s fixatives, which were all specialised but also which were coloured yellow, orange, orange and pale purple respectively.</div><div class=""><br class=""></div><div class="">However, others may have a different definition of the term, so I should wait and see what other answers you get.</div><div class=""><br class=""><div class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);">With all good wishes, Simon<br class=""><br class="">Simon Moore MIScT, RSci, FLS, ACR<br class="">Conservator of Natural Sciences and Cutlery Historian,</span><br class=""><br class=""><a href="http://www.natural-history-conservation.com" class="">www.natural-history-conservation.com</a><br class=""><br class=""><span></span><br class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"></span><span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;"></span><span><img apple-inline="yes" id="4786681E-5AC0-4CD1-8758-9183851F608E" src="cid:3543D570-FCD3-4F5F-B04C-2A6D3A8D9E27@home" class=""></span><span><img apple-inline="yes" id="3A11B6F9-4911-4A9B-B8C0-89800E03DBBE" src="cid:44ED9140-C81F-497F-B52B-A41A76C7F679@home" class=""></span><br class=""></div><br class=""><blockquote type="cite" class="">On 20 Jan 2023, at 15:41, Claire Smith <<a href="mailto:c.e.smith@pgr.reading.ac.uk" class="">c.e.smith@pgr.reading.ac.uk</a>> wrote:<br class=""><br class="">Hi everyone, <br class="">One of our students has come across a fluid specimen in our teaching collection that is preserved in “Triple Fix” – does anybody know what that is?<br class=""> <br class="">Many thanks for your help, <br class="">Claire <br class=""> <br class="">*******<br class="">Claire Smith (she/her)<br class="">Graduate Teaching Assistant & PhD Candidate, Cole Museum of Zoology <br class=""><a href="mailto:c.e.smith@pgr.reading.ac.uk" class="">c.e.smith@pgr.reading.ac.uk</a> <br class="">claire.smith@reading.ac.uk <br class="">www.twitter.com/wetconservatrix<br class=""> <br class="">_______________________________________________<br class="">Nhcoll-l mailing list<br class="">Nhcoll-l@mailman.yale.edu<br class="">https://mailman.yale.edu/mailman/listinfo/nhcoll-l<br class=""><br class="">_______________________________________________<br class="">NHCOLL-L is brought to you by the Society for the Preservation of<br class="">Natural History Collections (SPNHC), an international society whose<br class="">mission is to improve the preservation, conservation and management of<br class="">natural history collections to ensure their continuing value to<br class="">society. See http://www.spnhc.org for membership information.<br class="">Advertising on NH-COLL-L is inappropriate.<br class=""></blockquote><br class=""></div></body></html>