FIELD: printing.
SUBSTANCE: invention relates to specific types of printing, which enable to create in the body of sheet non-absorbent material of the original image of mono crystals of metals, which can protect it from forgery. The method to create images of mono crystals in the body of sheet non-absorbent material lies in the introduction of materials for formation of mono crystals from solution inside the sheet material and exposure to these materials by laser radiation pulses through the specific points of its surface, but in a solution containing the materials for formation of mono crystals and applied with a uniform layer on the surface of the sheet material a surfactant is administered, which forms a film on the surface layer of the solution, this film is cured and locate the solution layer between the cured film and the sheet material; and for the introduction of materials for formation of mono crystals, inside the sheet material the solution located under the film is exposed with laser pulses, occurrence of protective gaseous medium in the laser spot is caused at each point of such exposure, as well as the recovery in this medium of the material of metal to pure metal with the formation of clusters, which are introduced inside the sheet material on the channel formed by the laser beam, a high concentration of clusters is created in it, their expansion is caused at high speed to the channel walls, and melting with the formation of a liquid substrate, with subsequent obtaining, when cooling of metal nucleating centers, of their growth and formation of mono crystals, spliced with the sheet material.
EFFECT: obtaining of such a method of creating an image of mono crystals of metals in the body of sheet non-absorbent material that does not enable to enter into the interior of it the materials for formation of mono crystals as part of the solution.
2 cl, 2 dwg
