Last Updated: Jan 13, 2017     Views: 44


Thank you for contacting us with your question. I've consulted with the Museum Conservator and received the following response:

The glass won’t bubble, not with any chemical, not even hydrofluoric acid.

But, any kind of dirt/weathering/burial deposits will bubble with as little as 3 % of any acid, including acetic acid (aka, vinegar).  The reason for this is all dirt , deposits have some calcium carbonate in them , so it’s simply “Chemistry 101”—when you put a drop of weak acid on limestone it fizzes. Limestone is pure calcium carbonate.

So, the key word in this question is “antique”.  Nothing will happen to a new piece of glass.

Please let us know if you have any additional questions.

Best regards,


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Important Note

Alert: Museum Closed to Public. May Cause Delays.The Corning Museum of Glass is currently closed to the public effective March 16 through April 22, 2020, as a precautionary measure for public health and safety. As a result, resources available to answer your questions are extremely limited. During this closure, you may be interested in searching our Ask a Glass Question FAQs or reviewing our Research Guides on various topics. We also highly recommend checking out The Corning Museum of Glass on YouTube for hours of artist demonstrations, lectures, and special events. Thank you for your patience.

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