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HugeNerd@lemmy.ca

4 cup Pyrex measuring cup (lemmy.nz)

submitted 1 month ago* (last edited 1 month ago) by HugeNerd@lemmy.ca to c/thrifting_scores@lemmy.ca

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It's clean and looks new. I wanted a bigger cup and here we go! Granted the price isn't some great 1$ find like we used to have...

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[–] Davel23@fedia.io 8 points 1 month ago (1 children)

Turns out it's not as simple as that, and there is no real certain way to tell. This video goes into some good detail:

https://www.youtube.com/watch?v=2DKasz4xFC0

[–] TimothyOilypants@lemmy.ca 1 points 1 month ago (1 children)

Borosilicate and soda lime glass have a notably different index of refraction.

Submerged in mineral or vegetable oil, soda lime glass will be clearly visible, while borosilicate will disappear.

[–] Davel23@fedia.io 1 points 1 month ago

The video goes over that too. He tries both types of glass in mineral oil and there is little to no visual difference. Not saying that's always the case, but again it's not so simple.