Glassblowing in Action

Here's a portrait of my son Frank, who is apprenticing at glassblowing. 

It's fun to watch the process. Propane mixes with oxygen to make a powerful diagonal jet of fire that heats up and softens the glass. The stream of blue-colored flame turns to yellow-orange as soon as the glass touches it.

The warm light from the flame lit the front surfaces. Some cool fluorescents lit his back and the top of his head. 

I used casein in a watercolor sketchbook held up on a camera tripod. Having the work up high, close to my line of sight, makes accurate judgments much easier. I liked where I was sitting because my work was lit by the window behind me. The brim of the hat shields my eyes from the dangerously bright orange light.
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