Jacks are tweezer-like tools used for shaping glass.
A piece of fined-grained wood with a hemispherical depression used to cool and shape a gather of glass. Techniques Hot glass is a viscous liquid. Learning glass blowing begins with learning how to use heat and gravity to control its flow. To effectively gether glass, the iron should be warm enough for the glass to adhere to it. The tip of the iron should be reheated to a dull red.