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It depends on what concentration of b72 you are using, the solvent base, what you are applying it on (how porous), and the ambient Rh, temp., and air exchange. So I don't know if there are published cure / degassing times for all environments and situations. You can do some simple tests using replicant materials. Obviously having a fume hood / fan will speed things up since b72 is a resin that forms a film by solvent evaporation and not curing as an epoxy would. Using acetone as the solvent would also speed things up, and the usual concentration for museum objects is around 10% - 15% b72 in solvent. There may be some information in the MSDS sheet that could be useful both for b72 and the solvent you use.

On Jan 21, 2014 4:43 PM, "Nathan Johnson" <[log in to unmask]> wrote:

Hello everyone,

I work for a Zoo, part our updated biofact management plan includes the use of acryloid b-72 to label objects.

I know the dry time is around 15 minutes, but our vet staff needs to know the curing and degassing time.

Does anyone have experience in this?

Nathan

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