Silk screen foil ink is a type of ink that is used in the silk screening process to create metallic or shiny finishes on prints. The ink contains metallic pigments or foils that create a reflective or glittery effect when applied to the surface. This type of ink is commonly used in the printing of posters, labels, packaging, and other promotional materials to add a touch of luxury or visual interest to the design. Silk screen foil ink is typically applied with a squeegee through a screen onto the substrate, and then cured using heat or UV light to ensure adhesion and durability.