ENGRAVED OPTICALLY MODIFIED IMAGE Russian patent published in 2010 - IPC B05D5/06 

FIELD: technological processes.

SUBSTANCE: inventions relate to optically modified pigments, films, devices and images, and in particular to alignment or orientation of magnetic flakes, for instance in process of painting or printing, to produce illusory optical effect. Method is described, as well as image produced with the help of method, in which non-spherical magnetically aligned flakes of optical pigment in transparent carrier are applied onto substrate and aligned by means of magnetic field application onto substrate. Pigment flakes are aligned along power lines of magnetic field, and tool is applied to subregion of substrate for impression or engraving of flakes to change orientation or remove flakes from desired area. For instance, it is possible to use engraving tool to trace signature or other symbols inside magnetically aligned flakes. Then flakes harden, and image is produced, which has optical and tactile criteria.

EFFECT: provision of possibility to create tactile image, where it is possible to feel tactile transition between the first and second distinguishable areas, creation of bank note or secured document, which has tactile properties for assistance to blind people in verification of bank note or document authenticity, and also creation of image having optically modified area and having tactile areas above optically modified area.

19 cl, 13 dwg, 5 ex