Method and device for manufacturing a base layer having different degrees of hardness and workpiece having different degrees of hardness

Method, in particular for manufacturing areas providing different degrees of hardness in a base layer (3), comprising the following steps:

• step (S40):
• applying a masking on at least a partial area of the surface of the base layer (3), wherein the masking is configured to at least partially absorb electromagnetic radiation;
• step (S50):
• irradiating the base layer (3) and the applied masking with electromagnetic radiation, in particular with UV radiation and/or IR radiation, to set different degrees of hardness of the base layer (3).