An analysis of the advantages of laser marking is carried out in comparison with other methods of forming a given surface relief of structural materials, forming barcodes, and reading them. The necessary conditions for stable reading of barcodes, described by the value of the contrast ratio, are formulated. The elements of the prints of the laser exposure pattern that make up the barcode are classified, and an example of measuring and calculating the contrast ratio of samples using spectrophotometry is given. The parameters of the surface relief in the areas of the applied barcode are measured using scanning probe microscopy. The analysis of the influence of the parameters of laser radiation on the geometric characteristics of the elements of the barcode and the value of its contrast ratio is carried out.
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