Device for drying and sintering metal-containing ink on a substrate

A device for drying and sintering metal-containing ink on a substrate, the device comprising multiple optical radiators for irradiating the substrate and a reflector for reflecting radiation onto the substrate, the optical radiators and substrate being movable relative to each other in a transport direction, wherein the optical radiators are infrared radiators having a cylindrical radiator tube and a radiator tube longitudinal axis, the optical radiators emitting an IR-B radiation component of at least 30% and an IR-C radiation component of at least 5%, each based on total radiator output power, the optical radiators being arranged in a radiator module such that their radiator tube longitudinal axes run parallel to each other and transverse to a transport direction of the substrate, wherein the optical radiators irradiate an irradiation field on a surface of the substrate, such that the irradiation field is divided into a drying zone and a sintering zone downstream of the drying zone in the transport direction, and wherein the drying zone is exposed to at least 15% less average irradiation density than the sintering zone along a center axis running in the transport direction.