You could try two mild solvents, but all the associated rubbing will probably scratch the acrylic sheet. Many solvents will cause crazing of acrylic sheet (independent of scratching), especially alcohols and acetone (common solvents one might try). VM&P Naphtha and Paint Thinner (Home Depot brand, because I know it is Stoddard's Solvent) are worth trying in a test, using cotton swabs. Neither is an especially good solvent for the wide variety of adhesives used with tape, but they work "a little bit." Because they will not work well, you will need to rub to release the adhesive; this will probably cause scratching of the acrylic sheet. Start with a small test in an out-of-sight area; allow the solvent to dry before accessing feasibility. The process has a low probability of success and will probably cause scratching; it will be quite time consuming. We often see acrylic sheet with an unscratched band surrounded by two bands of scratching, defining the width of the tape. This is a clear indication that "solvent & rubbing" was used to remove the tape adhesive. The scratches from rubbing will only become obvious after the solvent has dried. The problem is that tape adhesive that has separated from the tape carrier is probably old and degraded, possibly even crosslinked. Degraded adhesive is even more difficult to remove from any substrate. Fresh tape will generally separate from acrylic sheet. If the residue is from fresh tape, try using more of the tape to pull up the small remaining bits. This technique has the highest probability of working without causing further damage. The other technique you might try is a crape rubber eraser (rubber cement eraser). Depending on the type of adhesive it could work. Here again, you will experience the problem of rubbing causing scratches. Soap and water will not work. Solvents that will work, such as methyl ethyl ketone and acetone, will definitely cause surface crazing of acrylic sheet. These solvents can be used on glass, but not acrylic sheet. This is a tough problem. Best of luck. > Does anyone have any suggestions on removing tape residue (not sure what kind of tape it was) > from the surface of a plexi glass frame? > Thank you, > Miriam Tim Vitale Paper, Photographs & Electronic Media Conservator Digital Imaging & Facsimiles Film [Still] Migration to Digital Format Digital Imaging & Facsimiles Preservation Associates 1500 Park Avenue Suite 132 Emeryville, CA 94608 510-594-8277 510-594-8799 fax [log in to unmask] Vitale bio http://videopreservation.conservation-us.org/tjv/vitale_1pg_bio.pdf Resume: see link in lower right corner of the URL above. Albumen Photography Website in 2000 <http://albumen.conservation-us.org> VideoPreservation Website in 2007 <http://videopreservation.conservation-us.org> ========================================================= 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).