Blow a glass bubble in two minutes with a 6mm borosilicate tube
Instructional video tutorial. Simple glass blowing technique of closing the end of borosilicate glass tubing and thickening the glass before blowing a nice spherical enlarged bubble. Used in this clip is 6mm x 1mm Borosilicate Pyrex Tubing worked on a low cost high velocity torch head attached to a TradeFlame Map Replacement disposable gas bottle available from most hardware or industrial supply outlet.

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