Crystal Fabric, PureCrystal ref 57335.
PureCrystal Crystal Fabric  is millions of tiny rough PureCrystal cut Crystals fixed on a hotfix silicone layer
Opaque black Base.

Simple use.
Set the Crystal on your tissue and fix it with the iron . Put a fabrics between the Crystal  and the iron.
Regulate the temperature of the iron due to the tissue you want to use.
In a few seconds your Crystal is fixed.

Here our technical explanations.

Sold per piece.