These were heat set with an iron over parchment paper on top of the pieces. I love how the fantasy film changes color with heat.
Covered the pieces with VersaMark ink and then Opals embossing enamel and heat with a heat tool. Added two more layers of Opals, heating with each addition. Because these pieces are so small, instead of laying the stamp on top of the pieces, I laid the hot piece down on top of the stamp (inked with VersaMark) and lightly pressed down. These set very quickly.