Making Cobalt Blue Glass

In this video I mix cobalt(II)oxide powder into some borosilicate glass to make blue colored glass.

[@bobh5004]

Super. If added Cu2O to glass and melted you can get a green color glass.

[@soup409]

Thanks that's a great idea.

[@fraktel_]

Do you have any idea how to recognize a tinted glass or a glass piece that was made just like yours with the color during the process?

[@lyndagabriel6539]

Ha! (re not snorting it, below). Beautiful end product. Serious question though, do you have any reference for leaching of cobalt from cobalt glass? I like to reheat my tea in the microwave, and my fav glass measuring cup is depression-era cobalt blue... I expect it's not a big issue since we're usually deficient in cobalt, and this is not heated long or high. But I'm still trying to find out... I'm already hypothyroid, so it's not an irrelevant concern. Any info appreciated.

[@midtwilightblue]

So pretty! I read that you just need a TINY amount of you wanted to make one lighter

[@user-rj6ds8yz9s]

الله ينور

[@11THEFEZMAN11]

I tried that with silver powder a few years ago, it kind of worked but mostly didn’t, I ended using it inside galaxy marbles with limited success, I think I needed a flux of some kind

[@psilocybe8135]

Isn't cobalt a carcinogen? I watched a segment about a cobalt glass maker who had been taught how to make it by his elderly father. His exact words were "you throws cobalt at it." I got the impression that the way they did it wasn't mixing, but *throwing* powdered cobalt chloride (?) onto the molten glass.

[@soup409]

May cause allergy or asthma symptoms or breathing difficulties if inhaled May cause cancer by inhalation. But that's why I decided not to snort it.

[@cynthiathehedgehog3086]

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