Direct printing method for printing a cover layer onto containers

摘要

Method for direct printing on containers via a direct printing machine, with a print layer printed onto the container, in a first predefined area, in a first device, and a cover layer applied to the container in a second device, the cover layer applied to a second predefined area. A surface area of the second predefined area is larger than that of the first predefined area. The cover layer coalesces with the printing ink in the first predefined area, creating a first connection, and coalesces with the container in parts of the second predefined area differing from the first predefined area, creating a second connection. The first and second connections are insoluble in aqueous solutions having a pH value between 3 and 10 and easily soluble in aqueous solutions having a pH value in a range of less than 3 and/or higher than 10.

主权项

1. A direct printing method for printing on containers with the aid of a direct printing machine, comprising printing a print layer onto the container, in a first predefined area thereof, in a first device in a first step, and applying a cover layer to the container in a second device in a second step, the cover layer being applied to a second predefined area, which comprises the first predefined area and the surface area of which is larger than that of the first predefined area, the cover layer coalescing with the printing ink in the first predefined area thus creating a first connection, the cover layer coalescing with the container in parts of the second predefined area which differ from the first predefined area thus creating a second connection, and the first and second connections being insoluble in first aqueous solutions having a pH value between 3 and 10 and easily soluble in second aqueous solutions having a pH value in a range of less than 3 and/or higher than 10, wherein the second connection between the cover layer and the container is stronger than a connection between the print layer and the container and the first connection is stronger than the connection between the print layer and the container.