Abstract: This invention is directed to a method of a radiation induced printing comprising the following steps: printing a printing ink comprising effect pigments on an ink carrier, which is optically transparent at a certain wavelength; followed by irradiating the ink carrier by means of an energy-emitting apparatus emitting energy in the form of electromagnetic waves, wherein the printing ink absorbs energy of the electromagnetic waves and undergoes a change in volume and/or position causing a transfer of droplets of the printing ink from the ink carrier to an imprinting material, wherein the printing ink comprises an effect pigment mixture containing flaky pearlescent pigments and flaky metal effect pigments.

Abstract: A conductive ink jet printing ink composition is provided comprising the following components: (a) 60-84.5 wt.-% of an organic solvent or a mixture of organic solvents, (b) 0.5-5 wt.-% of a binder, wherein the binder comprises ethyl cellulose in an amount of a range of 85 to 100 wt.-%, based on the total amount of the binder, (c) 15-25 wt.-% of silver particles having a d50-value in a range of 130 nm to 800 nm, (d) optionally antioxidizing agents, (e) optionally a dispersing agent for the silver particles different from binder (b), wherein all amounts are referred to the total amount of the ink jet printing ink composition, if not defined otherwise.