Substrate is a term used in converting process such as printing or coating as a more general term to describe the base material onto which e.g. images will be printed. Base materials include (though are not limited to):

• plastic films or foils,
• release liner
• textiles,
• fabrics,
• plastic containers
• any variety of paper (lightweight, heavyweight, coated, uncoated, paperboard, cardboard, etc.), or
• parchment.