STEP 2. Preparation for casting

First, a layer of soot from the oxy-acetylene torch is applied to the faces of the mold.

Above left: Using just an acetylene flame, Harvey Begay coats the tufa with soot.

Above right: The mold is ready to be clamped together.

1. STEP 1
2. STEP 2
3. STEP 3
4. STEP 4
5. STEP 5
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