Because the actual metallic salts added to the glass are unknown, the addition of some fluids (acids, or very hot liquids) could create a reaction. But most of the material is fused into the glass itself. Some types of iridescent glass cannot be used in microwaves for the same reason. Actual antique "carnival glass" may have collectible value, so using it could affect that.
As old as this thread is I thought I'd still add some points- If you consider uranium glass unsafe to use for food/drink (which most do) than you should think about getting a black light to check out your carnival glass. I recently found out my carnival set is uranium based. I would only use this for display purposes!
I would not know of any reason why it would not be safe to eat from.
Carnival glass refers to a specific form of molded glass that has a shiny, metallic sheen or shimmer. Interested individuals can purchase this glass from antique dealers or from online sites such as eBay.
Yes. It is the pottery you can’t eat from because it has a high content of lead. I wouldn’t put depression glass in the microwave though.
Lloyd Reichel has written: 'Modern carnival glass collectors' -- subject(s): Carnival glass, Catalogs, Collectors and collecting, Glassware
Food
Yes, most Libbey glass is oven safe. The glass is only oven safe to 450 degrees. The glass is also dishwasher safe.
Before the carnival starts up, they check it if its safe and if its 100% safe, FREE TIME!!! And yes you wont die they are safe
Yes, it's totally safe. I'm pregnant now, and every morning I eat liver mush on a bun with extra mayo and a tall glass of chocolate milk!
yes, its fine.
It is absolutely risk-free.
Yes. Glass, plastic, acrylic, are all safe for betas
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