Patent ID: 7510746

Claim:
A process for the production of a multi-layer coating comprising the following steps: A) applying a base coat layer of a pigmented colour-imparting and/or special effect-imparting base coat composition onto a substrate precoated with at least one coating layer, B) applying a coating layer of a coating composition curable by means of high-energy radiation onto the base coat layer, wherein the coating composition comprises at least one oligomeric and/or polymeric binder curable by means of high-energy radiation and does not contain reactive diluents curable by means of high-energy radiation, said high-energy radiation having a wave length in the range from 180-420 nm, C) completely curing the coating layer applied in step B) by irradiation with said high-energy radiation, D) applying a clear coat layer of a transparent clear coat composition curable by means of said high-energy radiation onto the cured coating layer without any intermediate step, said transparent clear coat composition comprising: a) at least one oligomeric and/or polymeric binder curable by means of said high-energy radiation, b) at least one low molecular weight reactive diluent curable by means of said high-energy radiation, c) photoinitiators and optionally d) conventional coating additives, organic solvents and/or water and E) curing the clear coat layer applied in step D) by irradiation with said high-energy radiation.