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Flexog coders or flexographic coder are designed for marking flexible film packaging with a code through the use of flexographic printing process. Flexographic printing involves four rollers to accomplish...

Flexog coders or flexographic coder are designed for marking flexible film packaging with a code through the use of flexographic printing process. Flexographic printing involves four rollers to accomplish the operation, an ink roller, a meter roller, a plate cylinder and an impression cylinder. The ink roller takes up ink from the ink pan by rotating through it. The meter roller applies the proper thickness (amount) of ink to the plate cylinder. The plate cylinder holds the printing plate or die that has been designed to print the proper characteristics of the code. The film passes between the plate cylinder and the impression cylinder. The impression cylinder applies pressure the flexible film and forces it into contact with the plate cylinder. The complexity of the code or imprint on the packaging is a function of the complexity of the design of the die plate. Also, though an individual flexographic printer or code capable of applying only one color of ink, a number of flexographic printers running in series are able to apply multiple colors and intricate designs to film packaging.