[Nhcoll-l] Marker on bone

Fri Jun 7 12:39:47 EDT 2024

Have you tried acetone?  It might help.  Each type of ink is affected by different solvents.

One trick is to create a poultice.  Dampen a small piece of cotton with your solvent (for example ethanol since that is working). Place the cotton over the number and cover it with tin foil or plastic wrap – something to keep it from evaporating.  Leave it.  The time depends on how long it takes for the ink to solubilize.  If the solvent is working, the cotton will absorb the ink.  You may not be able to get all of the ink out.  Bone is porous and the ink will likely have stained.  Therefore, we usually recommend putting a barrier layer (eg. B-72) down prior to marking any object.

Gretchen Anderson
Gretchen Anderson (she, her)
Conservator
Carnegie Museum of Natural History
AndersonG at CarnegieMNH.Org<mailto:AndersonG at CarnegieMNH.Org>

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From: Nhcoll-l <nhcoll-l-bounces at mailman.yale.edu> On Behalf Of William Poly
Sent: Friday, June 7, 2024 12:27 PM
To: Gali Beiner <gali.beiner at mail.huji.ac.il>
Cc: NHCOLL-new <Nhcoll-l at mailman.yale.edu>
Subject: Re: [Nhcoll-l] Marker on bone

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Hi Gali,

I've found that a strong ethanol solution (70-100%) strips permanent marker from many surfaces.

Cheers,
Bill

On Wed, May 1, 2024 at 3:30 AM Gali Beiner <gali.beiner at mail.huji.ac.il<mailto:gali.beiner at mail.huji.ac.il>> wrote:
Dear NHColl-listers,

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?

Best wishes,

Gali

--
[https://docs.google.com/a/mail.huji.ac.il/uc?id=0B5B3I3QnN7dsSzNkbGlLNDNGWG8&export=download]Gali Beiner (ACR)
Conservator, Palaeontology Lab
National Natural History Collections
The Hebrew University of Jerusalem
Berman Building, Edmond J. Safra campus, Givat Ram
Jerusalem 91904, Israel
Fax. 972-2-6585785
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