The system for color printing of films such as food cover e.g. sausage package made of polyamide, comprises a discharge surface on basis of polyamide with a radical hardening basic color and a radical UV-hardening printing ink, where the basic color comprises a reactive compound, which contains a group, which contains a compound with the polyamide surface such as isocyanate group and/or an ethylenically unsaturated group such as methacrylate group. The reactive compound is monomer, oligomer and/or prepolymer, color pigment and photo-initiator. The basic color comprises a reactive thinner. The system for color printing of films such as food cover e.g. sausage package made of polyamide, comprises a discharge surface on basis of polyamide with a radical hardening basic color and a radical UV-hardening printing ink, where the basic color comprises a reactive compound, which contains a group, which contains a compound with the polyamide surface such as isocyanate group and/or an ethylenically unsaturated group such as methacrylate group. The reactive compound is monomer, oligomer and/or prepolymer, color pigment and photo-initiator. The basic color comprises a reactive thinner. The radical hardening basic color has a viscosity of 0.3 Pa.s and/or the radical UV-hardening printing ink has a viscosity of 1.5-2.5 Pa.s. Independent claims are included for: (1) a single- or multi layered film printed with a radical hardenable printing ink; and (2) a method for the production of a printed film.
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