I always had this same problem of my B-72 drying out and would also dilute
it occasionally with acetone, but I have found that the bottle doesn't dry
out as quickly if you store the B-72 bottle inside a ziploc bag when not in
use.

Angela Watts
Associate Collection Manager
Spencer Museum of Art
University of Kansas

On Wed, Jan 31, 2018 at 7:58 AM, Rebecca Justinger <
[log in to unmask]> wrote:

> Hello,
>
>
>
> We use Paraloid B-72 to label our artifacts. With each bottle, we find
> that we are unable to use the last 1/4 because it has become too tacky and
> almost solid. I believe that I heard you could add acetone to the B-72 to
> make it usable again. Has anyone done this and have it work as it always
>
> did? How much acetone do you add? I really appreciate any information
> anyone has on this topic.
>
>
>
> Thank you,
>
>
>
> Rebecca Justinger
>
> Registrar
>
> The Buffalo History Museum
>
> [log in to unmask]
>
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