Prepare the Alumilite Amazing Clear Cast according to package directions. Be sure to work in a well-ventilated area, wear disposable gloves, and protect your workspace.
Add equal parts resin and hardener to the mixing cup. Each mold will need about 15 ml of resin.
If you are making multiple gift tags at once, split the resin into separate mixing cups. Add a generous amount of your favorite glitter or resin colorant into the resin cup(s) and mix together well until completely combined.
Slowly pour the resin into the mold until it reaches the top. Be careful not to overfill. Wait a few minutes for the bubbles to rise to the top, and then blow through a straw or spritz the resin with alcohol to remove surface bubbles.
Leave the resin to cure in an undisturbed area for 24 hours. You will know that the resin is cured and ready to be removed from the mold when the surface is no longer tacky and pulls away from the mold edges.
Next, carefully remove the gift tags from the molds. Cut away any over-poured resin using scissors, and sand any rough edges if necessary.