Glassblowing refers to the act of manipulating molten glass into artistic pieces. Many people recognize a form of glassblowing called free-blowing, which is the blowing of air through a tube into a blob of molten glass at the end of the tube. Free-blowing creates orbs of glass that can be formed into other shapes while the glass remains warm. Mold-blowing is similar to free-blowing, but includes placing the molten blob of glass into a shape mold and blowing the glass to fill the mold.
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