The mold is like a jacket or hood, separated from the miodel by just the thickness of the clay. 

 Model and jacket are given a coat of shellac and one of oil, then are put back in position and the 

 space between them filled with shie 



The glue hardens to form a mold witliin the plaster jacket, the model of the head having 

 been removed. [The photographs illustrate the process in connection with three different busts.] 

 A glue mold is firm enougli to give an accurate cast, yet yielding enough to allow its removal from 

 about the cast, however many undercuts the plaster surface may present 27 



