What is happening is that the acetone in the topcoat is simply dissolving the bottom coat. Adding more acetone simply makes it a better solvent. The best thing to do is use B67 for your topcoat. It is dissolved in naphtha, which will not dissolve the B72.

 

Hoping this is helpful,

Anne

 

Anne T. Lane, Collections Manager
Charlotte Museum of History
3500 Shamrock Drive
Charlotte NC 28215
704-568-1774, ext 110
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From: Museum discussion list [mailto:[log in to unmask]] On Behalf Of Amy Leonard
Sent: Tuesday, November 21, 2006 11:42 AM
To: [log in to unmask]
Subject: need advice with B72 and wood labeling

 

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.


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