Reaction Diffusion Silicone Ball Mold

thingiverse

Found an interesting shape and decided to make a silicone mold of it. <br>https://www.thingiverse.com/thing:1040716 https://youtu.be/UQE6s7SN8pk Mix clear Silicone #1 with with 5% - 25% corn starch. See "Proto-Putty" on YouTube and [Oogoo](https://www.instructables.com/How-To-Make-Your-Own-Sugru-Substitute/) for more information. Note that the molds come with an indentation where a screwdriver can be used to pry the mold apart. This is also used to make sure the molds are rotated correctly to each other. It's possible to cast without any air bubbles (because I accidentally did it on the first try), but it's difficult, and I haven't figured out the exact technique. There are two versions, 0.01 and 0.02. These are not version numbers but rather the tolerances for the indexing hemispheres (mold alignment pegs) between the male and the female. Depending on the detail level of the print settings, one may be better than the other for tight indexing. In order to do a small-scale test of the indexing, test samples of the regions are also included. The mold can be released in 20-30 minutes (it varies on the Silicone:Corn-Starch ratio), but you should wait 24 hours before removing it from a well-ventilated area and using it. Blender source file is also included. Nothing too schmancy, just a bunch of geometry booleans.