MARKING COMPOSITION

PURPOSE:To color develop a marked part with distinct white by employing marking composition containing cellulose derivative as a color developing ingredient for color developing with laser light rays when a maker's name, manufacturing date, etc., are marked on a surface of an electrical or mechanical component, a various type vessel, etc. CONSTITUTION:As a color developing ingredient to be color developed with laser light rays to be used for laser marking, marking composition containing cellulose derivative as an indispensable ingredient is employed. As such a marking composition, thermoplastic resin composition, thermosetting resin composition, light curable resin composition, inks, or lacquers are included. The composition is manufactured by uniformly mixing the derivative with the thermoplastic resin, the thermosetting resin, the light curable resin, the inks or the lacquers, and used in a state that a layer having a thickness of 1mum or more, preferably 5mum or more or further preferably 10mum or more is formed.