Milly Walker before she retired would always remind us to use India Ink
and pen. The solvent in the pigma pen is the same solvent or close enough
to the solvent in the B-72 that you are redissolving the layer. The top
coat will then smear the ink. Sorry, I love the pigma pens too.

Mary Kirby
Historic Upshur Museum
[log in to unmask]

On Tue, 29 Jun 2004 09:23:47 -0400 jmarks
<[log in to unmask]> writes:
> Hi,
>
> I bought Pigma Micron pens from University Products, and had trouble
> with the B-72 wiping away my numbers, after what I thought was a
> reasonable drying time.  Someone told me that pigment pens don't
> adhere
> to the B-72 (or acrylic in general) - sorry that I don't remember
> the
> source.  I haven't found a solution, but sidestepped the issue by
> printing the numbers on paper then adhering the paper to the object.
>  I
> learned about it on this list, you can check the archives for more
> information.
>
> I believe the B-72 is meant to be very thin, for numbering purposes.
>  You can use it as an adhesive when it's thicker.  Has anyone else
> heard
> this?  (I also have the problem of the acetone evaporating over
> time,
> even when I thought the bottle was tightly sealed, but the B-72 can
> easily be reconstituted with more acetone.)
>
> John Marks
> Geneva (NY) Historical Society
>
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