Last Updated: Dec 11, 2016     Views: 28

A "witch ball" is a basic bubble of glass, usually blown at the furnace. 

I haven't found explicit instructions for creating them; however, the following books illustrate the initial steps for blowing a bubble in glass. (Please see the attached bibliography for more information) 

Burke, Glassblowing: A Technical Manual. 
McKelvey, James. The Art of Fire: Beginning Glassblowing. 
Schmid, Edward T. Beginning Glassblowing.


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