Sunday, March 25, 2012

Duluth Project Update

the wax heads ready for ceramic shell process

back of sections, the red wax, called sprues, act to channel the molten bronze to the pattern

the pieces after the first dip in the liquid silica 

second dip of liquid, allowed to drip off the excess

subsequent dips of liquid are followed by dry coats of stucco in progressively coarse grades  with 10 coats total

the completed refractory shells are now de-waxed, creating a cavity in the mold where the wax was

molds are placed in the kiln and brought up to 1800 degrees, that temp is held for one hour to vitrify the molds making them strong enough for the 2100 degree bronze

Man's face right after breaking away the mold

woman's face

It has been a busy couple of weeks around the studio. We have poured three times with good results in spite of having my pyrometer (used to check the temperature of the molten bronze) die on me. Other troubles have been four trips to the dentist for a problem tooth and infection and smashing my head on a sculpture resulting in a gash on my forehead. Just your average times at the sculpture studio.  I am, however, very pleased at the outcome of our efforts.


  1. Looking good, sorry to hear about the personal problems though. Take Care!

  2. Interesting how you're making heads, while your own head is falling apart.