Today we learnt how to make studio plaster moulds of our head casts. I started by using water based clay to prop up the head face up to section it off as the first section of this 3 part mould, i pressed the end of a tool into the clay to make keys, to ensure the mould would fit together securely when casting.
I then mixed up some casting plaster, waited for it to start to turn enough for me to scoop it onto the face. Plaster is A thixotropic fluid so is thick when still but becomes runny when agitated. So to capture the fine detail the first handful placed on is shaken a little to let it become liquid and flood into all the fine detail. The rest of the plaster is put on in handfuls and smoothed over, I agitated it at the end to create a flat plane to rest the mould on later.
Once it was cured I turned it over and removed the clay. I then used the clay to build a wall to separate the head in half, I used paint to mark the edge of the first piece of the mould and painted slip on the exposed plaster to act as a release agent. I then repeated the plaster process to complete the second part of the mould.
To finish the mould I simply repeated the process for the final section to be opened tomorrow.