The invention, which relates to a method for producing a low-emissivity layer system on at least one side of the substrate, the method comprising the steps of providing the substrate, forming at least one low-emissivity layer on at least one side of the substrate by a deposition process and briefly tempering at least one deposited layer, addresses the problem of reducing the sheet resistance, and thus the emissivity, of the low-emissivity coating and reducing the use of expensive IR-reflective coating material. According to the invention, said problem is solved by adjusting the electromagnetic radiation used for briefly tempering a low-emissivity layer in such a manner that the tempered layer has layer properties comparable to those of a conventionally heat-treated low-emissivity layer of a safety glass.