I agree with Marc but will offer a few thoughts. First, you ned to be
careful with the solvent that you are using with the B-72, especially
on painted or decorated wood surfaces and finishes - it maay not be aa
big problem when applying the baase coat but it could really destoy a
locaalized area if that number and base coat have to come off. Also,
if you are using b-72, then inking the number, and then a topocoat of
b-72, this could very well be your problem. Usually the topcoat is a
different resin, such as b-67 so that it is in a differnet solvent
than the base coat. It also sounds like your mixture may have
evaporated and become too concentrated, usually a 10% - 20% solution
is what is need for labelling.

As in all things conservation wise - always test an inconspicous area
with a small q-tip and the solvent to see if it will affect finishes
and paints before using a large amount (as in labeling) in a more
conspicuous area. I am sure that you know this, but just for those who
have less experience, always choose an area for labelling a class of
artifacts that is
consistent, such as the back of the propwr right chair leg, for example.

Cheers!
Dave

David Harvey
Conservator
Los Angeles, California
On 11/21/06, Amy Leonard <[log in to unmask]> wrote:
>
>
> We are working on a project placing permanent numbers on unfinished wood
> objects (furniture parts) by means of a base layer and topcoat of B72 with
> the number written with a .01 micron pen. We have encountered problems with
> bubbling of the B72  / goopiness, so that it obscures the number once a
> topcoat has been placed over. When we try to remedy the goopiness by adding
> a bit of acetone to the B72 mixture, it causes the ink to  smear. We are
> trying to find the best solution (pun intended) because we cannot use
> tagging. We have considered pencil only and also just using a base coat of
> B72 with no top coat. Any suggestions? Thanks.
> ________________________________
>  Get the latest Windows Live Messenger 8.1 Beta version. Join now.
> ========================================================= Important
> Subscriber Information:
>  The Museum-L FAQ file is located at
> http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed
> information about the listserv commands by sending a one line e-mail message
> to [log in to unmask] . The body of the message should read "help"
> (without the quotes).
>  If you decide to leave Museum-L, please send a one line e-mail message to
> [log in to unmask] . The body of the message should read "Signoff
> Museum-L" (without the quotes).
>


=========================================================
Important Subscriber Information:

The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes).

If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).