Glass and Ceramic Guide

Glass and Ceramic Information

Is milk glass safe?

Yes, modern milk glass, also called opal glass, is safe. It is a combination of glass, which is a very healthy material, mixed with opacifiers to give it its signature milky, or opaque, look. The most common opacifiers used today are titanium dioxide (also used in sunscreen) and tin oxide (considered safe, even by the EWG.) These are mixed in with the glass during the melting process, and are generally inert, not leaching out.

In the past, bone ash (from animal bones) and various lead and cadmium -containing compounds were used. Vintage milk glass, especially when used with hot, acidic, or fatty foods, can leach these into your meal or drink.