Laminated packaging material for liquid food products, a method for making the same, a method for printing on the same and a package made from the same

A liquid food package comprising,

• a core layer of paper or paperboard or other cellulose-based material having a first and a second side, the second side being on the opposite side from the first side of the core layer of paper or paperboard or other cellulose-based material,
• a laminate portion being arranged on the first side of the core layer of paper or paperboard or other cellulose-based material,
• a dark colored flexographic ink composition that is printed onto a surface of the laminate portion not in contact with the core layer and that is cured through heating to dry the dark colored flexographic ink composition so that a printed pattern exists on the surface of the laminate portion, the dark colored flexographic ink composition at least partly covering the surface not in contact with the core layer, and, wherein the dark colored flexographic ink composition comprises color bases mixed at a ratio such that a total energy absorption of the dark colored flexographic ink composition, when provided on the laminated packaging material, is below 80% of the radiance energy in an emission spectra from a tungsten light source in the region 250-2500 nm at a temperature 3000 K,
• wherein the dark colored flexographic ink composition has a color space lightness value L*≤25, and
• wherein the dark colored flexographic ink composition has a color space difference, ΔE2000, equal to or lower than 6, with respect to a black reference composition,
• wherein the black reference composition has in the color space;
• a lightness value L*=17,
• a red-green color component a*=0, and
• a blue-yellow color component b*=0.

A laminated packaging material for liquid food products comprising,

• a core layer of paper or paperboard or other cellulose-based material having a first and a second side, the second side is on the opposite side from the first side of the core layer of the paper or paperboard or other cellulose-based material,
• a laminate portion being arranged on the first side of the core layer of paper or paperboard or other cellulose-based material,
• a dark colored flexographic ink composition that is printed onto a surface of the laminate portion not in contact with the core layer and that is cured through infrared irradiation to dry the dark colored flexographic ink composition so that a printed pattern exists on the surface of the laminate portion, the dark colored flexographic ink composition at least partly covering the surface not in contact with the core layer, and
• wherein the dark colored flexographic ink composition comprises color bases mixed at a ratio such that a total energy absorption by the dark colored flexographic ink composition, when provided on the laminated packaging material, is below 80% of the radiance energy in an emission spectra from a tungsten light source in the region 250-2500 nm at a temperature of 3000 K,
• wherein the dark colored flexographic ink composition has a color space lightness value L*≤25, and
• wherein the dark colored flexographic ink composition has a color space difference, ΔE2000, equal to or lower than 6, with respect to a black reference composition, wherein the black reference composition has in the color space;
• a lightness value L*=17,
• a red-green color component a*=0, and
• a blue-yellow color component b*=0.

A method of printing on a laminated packaging material for liquid food products comprising,

• providing a core layer of paper or paperboard or other cellulose-based material having a first and a second side, the second side is on the opposite side from the first side of the core layer of paper or paperboard or other cellulose-based material, a laminate portion being arranged on the first side of the core layer of paper or paperboard or other cellulose-based material,
• printing a dark colored flexographic ink composition on a surface of the laminate portion not in contact with the core layer,
• curing the dark colored ink composition through heating to dry the dark colored ink composition so that a printed pattern exists on the surface of the laminate portion, the dark colored ink composition at least partly covering the surface not in contact with the core layer, wherein the dark colored flexographic ink composition comprises color bases mixed at a ratio such that a total energy absorption of the dark colored flexographic ink composition, when printed on the laminated packaging material, is below 80% of the radiance energy in an emission spectra from a tungsten light source in the region 250-2500 nm at a temperature of 3000 K,
• wherein the dark colored flexographic ink composition has a color space lightness value L*≤25,
• wherein the dark colored flexographic ink composition has a color space difference, ΔE2000, equal to or lower than 6, with respect to a black reference composition,
• wherein the black reference composition has in the color space;
• a lightness value L*=17,
• a red-green color component a*=0, and
• a blue-yellow color component b*=0.