Rubber Mold Making

We had the opportunity to make a rubber mold for a project Professor Webb is working on. After many calculations and playing with numbers we came up with the right amount of rubber to make. Using specific ratios and mixing methods we had a "waste mold" in no time. 

 I am applying a release agent to the clay mold which will make the rubber easily peel off.  

In order to make the rubber workable, we had to add a thickener so we could pull the rubber up on the sides to keep it from slouching down. 

Not the prettiest but it does its job. The reason it is okay that it looks like this is  because it is a waste mold. A waste mold is created then used to cast a plaster positive to be touched up. After that positive is perfect, another mold is made of rubber and that will be the permanent rubber mold.