uranium? (drinking glass)

these look like 1970's design to me but I know nothing about glass

Are you asking if it is Uranium Dan as well as the maker?

If you are, try using a ultra violet light on it. It will glow in the dark if it is Uranium. Dating it would be difficult but if the glass is a yellowy green it is probably from the twenties or thirties or a bit earlier but not uniquely.

The stronger the glow generally means the more Uranium in the glass, which usually means the earlier the glass. Up to the 1940's some glass could have up to 25% Uranium content. Once the affects of Uranium was known that content decreased to about 2%. Very little Uranium glass was produced from 1945 to 1958 and today only very small items such as marbles and beads are produced with the odd piece of art glass.

To get a maker without a mark would be difficult as so much was produced. From the photos they look a bit like craquele glass or is that just the camera? If so I would think that would narrow it down a lot.

Did sklo union glass produce uranium green ?

Dan, do you not have a blacklight you can shine on it? Mine's a tiny one on a keyring that I bought for a fiver and take everywhere with me.

Yes SU did use uranium glass however if your piece is SU or not I can't say.

We need Christine with her unrivalled knowledge of uranium/radioactive glass & chemistry .... cooooo eeeeeey Christine, where are yoooooo?

I'd say that it's probably just green glass. I'm not sure I've ever seen uranium glass used in this this marvered technique, whereby the initial gather of clear glass is rolled in coloured glass chips before being reheated and blown.

Hard to pin down a place/date on technique alone, as it was used in lots of places, and for a long time. Could easily be as old as 1930s-50s - the shape looks good for it.

thanks guys,I did wonder whether it was uranium glass but I don't know what crackle glass is?
I don't have a light to test then as I'm not into glass

Not uranium glass IMHO and probably post 1950s.

Did sklo union glass produce uranium green ?

Yes (at least the factories involved did, both pre- and just post-War) but this is mould blown and not pressed.