ИСТИНА

A unique two-module test stand has been developed, manufactured and certified for conducting research and full-scale industrial tests for frictional wear of laser-induced identifica-tion codes on the surface of structural and functional materials for various purposes. The stand was put into operation in real production conditions at Laser Center LLC (St. Petersburg). The requirements for the storage and operation of products containing laser coding are formulated for the maximum permissible levels of external impact on structural and functional materials. Using the developed test bench, research and development technological work was car-ried out to study the microstructure, elemental and phase composition of the surface and thin near-surface layers of inorganic (metals, alloys, semiconductor compounds, ceramics, glass, pol-ymers, etc.) and other materials (leather, fabric, paper, cardboard, etc.) aimed at characterizing the surface and near-surface layers of these materials before and after laser processing, as well as after testing the resistance of the generated laser-induced barcodes to mechanical, thermal and chemical damage to these materials. In order to increase the stability of laser-induced identifica-tion codes and the reliability of their reading for the studied materials, recommendations were developed for preliminary surface preparation, modes of application and reading of identification codes. Requirements for the storage and operation of products with surface laser coding have been developed for the maximum permissible levels of external impact on the surfaces of struc-tural and functional materials.