To the uninitiated or those with only a minor knowledge of coating, the aims of a coating practitioner seem relatively easy to define: one must deposit a specially formulated fluid substance onto a high-speed (usually) web 
(substrate) and then dry it or cure it. If asked if that was all there was to coating, they would perhaps go on to say that the coating must be of a prescribed thickness, deposited in a uniform manner and in terms of appearance must be free of imperfections.
In practice coating is much more involved. It is an increasingly complex process directly and in-directly dependent upon many supply chain providers, including technology providers such as RK Print Coat Instruments Ltd, manufacturers of quality control, product monitoring and research and development devices and systems.