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] > > ------------------------------ > > To unsubscribe from the MUSEUM-L list, click the following link: > http://home.ease.lsoft.com/scripts/wa-HOME.exe?SUBED1=MUSEUM-L&A=1 > ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).