How to MAKE a Geico Caveman Costume

Step 5 Cast the sculpture and adding latex

So your done sculpting, now mix up some plaster putting a thin layer on first, making sure it gets in all the cracks. Then keep plopping more on until you cover the whole thing. Let it fully dry so when you pull it off the cracks and lines are not left in in the sculpture.

The second pic shows the inside of the casting even though it looks like the positive its actually a negative. It looks wet because it is, I added the liquid latex in multiple layers so it gets thick. The last pic is when it is almost dry. I left it over night just to be sure it fully cured. END OF DAY ONE

Comments

[OdieGiblet]

Great mask, I just finished making mine and I'm happy with how it came out. Thanks for the idea! But this tutorial is definitely lacking some information which left me scratching my neanderthal scull. I used this site to help me fill in the gaps on how to do it. The site uses all clay in the first mold, but it's pretty much the same thing.

www.dalchem.com.au/

[echuta86]

What kind of plaster did you use here? I put plaster over my mold and now I can't seem to separate them. Was I supposed to use alginate to cover it then plaster bandages? Any help would be appreciated!

[echuta86]

OK, FINALLY!!! For those of you who are stuck on step 5 or are confused. On my second try I got it right. Here are some helpful tips:

1) To make your life easier, lay your molded face facing up. Use molding clay and put about 1 inch x 1 inch wall around the base of the face. This will help you use leverage to pry the mold from the plaster at the end.
2) Before you start layering plaster on top, cover your molded face and wall from step 1 with a thin layer of vaseline (I've heard soapy water works or there is a liquid you can get from a ceramic store but for me, vaseline worked great!). Be very thorough and spread nook and cranny.
3) When you prep plaster, be sure to make plenty. You'll want mounds and mounds on top. I think I used about 3 quarts (combined volume) and gave everywhere a good 2-3 inches worth
4) Wait for the plaster to start setting (ie, it just start changing from watery to gooey) before you start putting it on top of the mold.
5) After the plaster has set on top, I used a screw driver to start prying out the inner mold gently along the 1 inch clay wall going in a circular motion. It will start to give slowly and you can just life it out about 1/2 way around.