Flexography has been broadly used as a rapid and an efficient way of applying easy designs and areas of color to a wide variety of packaging materials, such as paper and plastic containers (including waxed-paper ones), corrugated-cardboard boxes, metal foil, tape, envelopes. It's a kind of printing process which uses a flexible relief plate. It's widely used for printing on the non-porous substrates needed for different food packaging (It's also well suited for printing vast areas of solid color).