Security document and/or document of value, wherein, in a print layer applied to a substrate, first partial regions (7a-d) of the document have a non-radiation-modified component or a slightly radiation-modified component, wherein, in the print layer, second partial regions (8a-d) of the document contain, in the case of the non-radiation-modified component in the first partial region (7a-d), a radiation-modified component or, in the case of the slightly radiation-modified component in the first region (7a-d), contain a more strongly radiation-modified component, wherein a slight radiation modification is achieved by exposition of a radiation with a lower energy dose rate compared to a stronger radiation modification, in which a higher energy dose rate is used, wherein the radiation-modified component differs from the non-radiation-modified component exclusively due to radiation-induced structural differences, namely differences emerging from a radiation modification selected from the group consisting of bleaching a colour, photochemical fission, photoinduced reactions and photophysical processes, wherein the first partial regions (7a-d) are not distinguishable with the human eye from the second partial regions (8a-d), wherein the first partial regions are distinguishable from the second partial regions by means of instrumental measuring devices, wherein the instrumental devices are configured to detect said radiation-induced structural differences, wherein the first partial regions and the second partial regions form a pattern, wherein the component is a dye which is perceptible or is not perceptible in visible light, and wherein the pattern is not solvable with the human eye, but is solvable by means of a detector of the instrumental devices to detect the radiation-induced structural differences. wherein, in a print layer applied to a substrate, first partial regions (7a-d) of the document have a non-radiation-modified component or a slightly radiation-modified component, wherein, in the print layer, second partial regions (8a-d) of the document contain, in the case of the non-radiation-modified component in the first partial region (7a-d), a radiation-modified component or, in the case of the slightly radiation-modified component in the first region (7a-d), contain a more strongly radiation-modified component, wherein a slight radiation modification is achieved by exposition of a radiation with a lower energy dose rate compared to a stronger radiation modification, in which a higher energy dose rate is used, wherein the radiation-modified component differs from the non-radiation-modified component exclusively due to radiation-induced structural differences, namely differences emerging from a radiation modification selected from the group consisting of bleaching a colour, photochemical fission, photoinduced reactions and photophysical processes, wherein the first partial regions (7a-d) are not distinguishable with the human eye from the second partial regions (8a-d), wherein the first partial regions are distinguishable from the second partial regions by means of instrumental measuring devices, wherein the instrumental devices are configured to detect said radiation-induced structural differences, wherein the first partial regions and the second partial regions form a pattern, wherein the component is a dye which is perceptible or is not perceptible in visible light, and wherein the pattern is not solvable with the human eye, but is solvable by means of a detector of the instrumental devices to detect the radiation-induced structural differences.