Step 1: Materials Needed.
Plaster of paris
Canola cooking oil spray
Step 2: Making a Border
Now unfortunately I did not take a picture of this, but I found a good example from another sculptor, and how he does it in the link below.
..... I really dont need to show you any more about this.
Ps. Make sure to spray your sculptor with a good amount of cooking oil to make sure it doesn't stick, and make sure to get out as many air bubbles from the plaster before poring.
Step 3: Breaking Your Mold Open
Your next step is to simply remove any of the existing sculpture inside, be warned, this can be a heart breaking sight.
Once youv done that you need to go through and fill any small air-pockets that may have formed from the bubbles in the plaster.
Step 4: Pouring Your Latex
When youv put the mold back together you need to place it upside down, fill it completely with liquid latex, And let it sit for about 4 hours.
Latex dries from the outside in, and the plaster absorbs a lot of the moisture from the latex, which speeds up the process, after this is done, drain the latex and let it dry for about 16- 20 hours, or until dry, if you want it thicker then repeat to desired thickness.
Make sure to do the casting in a well ventilated area as the ammonia from the latex is strong stuff and not good for your lungs.
Please feel free to ask questions, and any suggestions are welcomed.