YOUR PDF OR ILLUSTRATOR FILE must have five layers. Here is an article which explains how to do this.
It is critical that your foil layer is overprinted before you export to PDF. Here is an article on how to do this.
You can upload a five-layer PDF file with the foil portion color labeled IFOIL or an Illustrator file foil portion color in a swatch called IFOIL. A JPG file does not work on this product.
We are launching this product as single-sided only in June 2024. Once we have volume we will add the double-sided option.