Answered By: Aprille Nace
Last Updated: Jan 13, 2017     Views: 21


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,