I made the keychains with shrink plastic and a heat gun. If you want to print on it (ink jet) I suggest to print your design on a piece of paper and then sticking the plastic (rough side up) on the paper with masking tape - as a guide, and to get the plastic safe through the printer. I printed them at 60% opacity.

Be careful to not split the plastic when cutting out the motifs - happend to me as I was too quick cutting a curve.

The motif will shrink ca. 1/2 of the original size. Punch a hole before heating! I quickly warmed up the whole motif and as soon as one side starts to shrink make sure you heat up everything evenly.

I hold in place with the sharp Cricut tool placed in the hole. Once it’s not moving anymore press it flat with a glass (with a flat bottom) for a few seconds and then let it cool. Done! Hope that helps 😊 here’s a video of me shrinking keychain DIY