Flexography is a printing press technique that allows printing on almost all surfaces, including metal objects. It is basically a modern version of a letterpress device.

http://www.daclabels.com/What_is_Flexography_/what_is_flexography_.htm

Flexography is commonly used to print labels, packaging materials, newspapers, and corrugated cardboard boxes. It is a versatile printing method that is especially well-suited for long print runs and materials that require quick drying inks.

Text/image must be reversed. Not suitable for detailed images like photos

Advantages of flexography * Prints on wide variety of absorbent and nonabsorbent substrates. * Prints using resilient rubber or photopolymer image carrier,so that millions of impressions can be made. * can print more than 10 colors if multiple print station are used. * It uses fast drying inks which might be solvent based, water based or UV curable. * Cost effectivenukghj