Step 3Mix and Pour
After the plaster looks good, add the food coloring. You can skip this step if you are going to paint the heart instead. I like the food coloring because you can keep the texture of the plaster, which reminds me of a conversation heart.
Pour the mold. Remember to tape the USB drive up or the circuit will short ; that is very important. The plaster dries darker than it is when it is wet.
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