Three of the 4 masks I will make molds of so I can have more than one of each to glaze & paint. Because that's the most fun part. 
This is the fourth, the first one I sculpted, the tester.
First I coated the surface with liquid soap so it would release from the plaster once the plaster set & hardened. Then I filled in the undercuts with oil based clay for the same reason.
Now it's time to pour in the plaster...
...gotta mix it with water first...
...mix it good...
...once it's poured, all ya do is wait ~20 minutes for it to set...
...then the aluminum flashing comes off...
...and the bottom, which is now the top...
...and whalla, a mold is born.
Three of the 4 masks I will make molds of so I can have more than one of each to glaze & paint. Because that's the most fun part. 
This is the fourth, the first one I sculpted, the tester.
First I coated the surface with liquid soap so it would release from the plaster once the plaster set & hardened. Then I filled in the undercuts with oil based clay for the same reason. 
Now it's time to pour in the plaster...
...gotta mix it with water first... 
...mix it good...
...once it's poured, all ya do is wait ~20 minutes for it to set...
...then the aluminum flashing comes off...
...and the bottom, which is now the top...
...and whalla, a mold is born. 