Recently, I designed a 3d printed mold to make Ditto(from Pokemon), using silicone rubber.
I like adding coloring to silicone to make colorful Ditto, but I found out that silicone Ditto is too large, so designed a new mold that can make 9 smaller Dittos at one batch, consuming about the same amount of silicone as previous version.
This time, each small Ditto consumes about 21g of silicone, and so, you need around 190g of silicone each batch.
The mold itself can be printed without support. For mold material I used PLA. I hollowed up some places to reduce filament usage. This mold is an one part mold, so there is no leakage problem at parting line, and it is very easy to mold, and demold.
Some tips:
Silicone I used is HTV-2000 from EngravingJapan. Its hardness is 20 and mixes at 1 to 1 ratio.
Coloring I used is coloring for silicone, as I afraid some coloring may cause silicone to not cure completely.
The author remixed this model.