Method and device for producing and transferring diffractive microstructures to a printing material and printing press having the device

A method for producing and transferring diffractive microstructures to a printing material, the method comprising the following steps:

• providing paper or board as the printing material;
• providing an embossing cylinder with a surface relief microstructure for producing the diffractive microstructures;
• providing an engraved roll;
• applying a fluid to the embossing cylinder at an application point by using the engraved roll;
• initially drying the fluid in a region between the application point and a transfer point onto the printing material, thereby solidifying the fluid and fixing the diffractive microstructures in the fluid;
• and
• transferring the solidified fluid with the fixed diffractive microstructures to the printing material in the form of a film.