<div dir="ltr">Hi Gali,<div><br></div><div>I haven't tried this yet but have been thinking about it for a while (and maybe someone here has tried it and can comment). How about using a gel?</div><div><br></div><div>Let me know if you find a good solution!</div><div>Mariana</div><div><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div style="font-size:12.8px"><font color="#351c75"><b>Mariana Di Giacomo, PhD</b></font></div><div style="font-size:12.8px"><b style="color:rgb(53,28,117);font-size:small">Natural History Conservator, Yale Peabody Museum</b><div style="font-size:small"><span style="color:rgb(53,28,117)">Associate Editor, Collection Forum, SPNHC </span><br></div><div style="font-size:small"><span style="color:rgb(53,28,117)">Secretary/Communications APOYOnline</span></div><div style="font-size:small"><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">El mié, 1 may 2024 a las 4:07, Simon Moore (<<a href="mailto:couteaufin@btinternet.com">couteaufin@btinternet.com</a>>) escribió:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi Gali,<br>
<br>
I used to have to do this and found that the most effective way was using some 10% hydrogen peroxide with a drop of 0.880 ammonium hydroxide mixed in and this pipetted onto the marked area. After a few minutes, the ink particles started to lift off, so I rinsed the area with water and used an old toothbrush. At worst, this slightly lightened the treated area but otherwise the number had gone.<br>
<br>
With all good wishes, Simon<br>
<br>
Simon Moore MIScT, RSci, FLS, ACR<br>
Conservator of Natural Sciences and Cutlery Historian.<br>
<br>
<a href="http://www.natural-history-conservation.com" rel="noreferrer" target="_blank">www.natural-history-conservation.com</a><br>
<br>
<br>
> On 1 May 2024, at 08:30, Gali Beiner <<a href="mailto:gali.beiner@mail.huji.ac.il" target="_blank">gali.beiner@mail.huji.ac.il</a>> wrote:<br>
> <br>
> Dear NHColl-listers, <br>
> <br>
> I'm having the bad luck of having to remove an old number written directly onto the many bones of an entire skeleton with a black marker, which is proving to be far too permanent. Those of you familiar with such tasks won't be surprised to hear that the only thing with any effect at all is ethanol, but that even so the number is still very much there. I'm hoping maybe people here have some tricks up their sleeve that I haven't tried yet in effort to remove the marker off the bones. Suggestions, anyone? <br>
> <br>
> Best wishes, <br>
> <br>
> Gali <br>
> <br>
> <br>
> <br>
> -- <br>
> Gali Beiner (ACR)<br>
> Conservator, Palaeontology Lab<br>
> National Natural History Collections<br>
> The Hebrew University of Jerusalem <br>
> Berman Building, Edmond J. Safra campus, Givat Ram<br>
> Jerusalem 91904, Israel<br>
> Fax. 972-2-6585785<br>
> <a href="mailto:gali.beiner@mail.huji.ac.il" target="_blank">gali.beiner@mail.huji.ac.il</a><br>
> <a href="https://nnhc.huji.ac.il/?lang=en" rel="noreferrer" target="_blank">https://nnhc.huji.ac.il/?lang=en</a><br>
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NHCOLL-L is brought to you by the Society for the Preservation of<br>
Natural History Collections (SPNHC), an international society whose<br>
mission is to improve the preservation, conservation and management of<br>
natural history collections to ensure their continuing value to<br>
society. See <a href="http://www.spnhc.org" rel="noreferrer" target="_blank">http://www.spnhc.org</a> for membership information.<br>
Advertising on NH-COLL-L is inappropriate.<br>
</blockquote></div>