Marking objects with pen and ink

[Mike Reuter]

The blak ink that I use to mark objects with their Object ID number smears when I apply the final coat of Acryloid B-72 in Aceton.  I use a dip pen to apply the number, wait for it to dry (24 hours) and yet is still smears.  What ink (brand and type) do you use to permanently mark objects?  Is there something better to use than B-72 for the final overcoat?

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