It's All in the Chemicals
However, many popular promotional products are made from materials like vinyl, plastics, or nylon, such as pens, tote bags, and cups, to name a few. The most common imprint methods for these materials are screen printing and pad printing, both of which take an ink and apply it to a product. Screen printing is ideal on flat surfaces, and it's the most common printing process used on plastic materials. Pad printing, in contrast, is used on irregular surfaces (like sunglasses or key chains). Both methods transform a plain promotional product into a branded beauty by creating a chemical reaction, which transforms the liquid ink to a solid film integrated into the product.