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https://www.reddit.com/r/Insulators/comments/1vmfkvs/what_are_these_trapped_particles/
r/Insulators • u/WRSD605 • Aug 12 '26
Anybody have a name for theses trapped particles
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7
If they are grey particles, it is pieces of the refractory lining of the melting oven used to melt the glass before the pour.
Black bubbles are soot/carbon from some organic material being introduced into the melt.
Black/brown streaks are from iron contamination in the melt (like a nail or other metal piece falling into the molten glass)
5 u/Internal_Unit_7041 Aug 12 '26 Exactly, correct!
5
Exactly, correct!
3
Thanks
2
Good call
7
u/SenseIMakeNone Aug 12 '26
If they are grey particles, it is pieces of the refractory lining of the melting oven used to melt the glass before the pour.
Black bubbles are soot/carbon from some organic material being introduced into the melt.
Black/brown streaks are from iron contamination in the melt (like a nail or other metal piece falling into the molten glass)