The paper is devoted to the study of the optical indexes of UV inkjet imprints on polymeric materials. The appearance of new types of polymeric materials with different textures and colours, on the one hand, helps to expand the range of souvenir, advertising and gift products, and on the other hand, there is a need to provide accurate colour reproduction on different surfaces. An actual task is to ensure accurate reproduction of the corporate colour when branding business products, making advertising and souvenirs on various materials, which will contribute to the recognition of companies. The paper analyses the regulatory documents that guide the production and quality control of digital imprints. It has been found, that the assessment of colour reproduction accuracy requires a comprehensive approach and includes: selecting a reference for comparison; establishing the level of required reproduction accuracy (A, B and C); taking into account the viewing distance of imprints. Based on the results of the study, it was found, that the colour of the printed material has a critical impact on the chromaticity of colour. It was found, that the application of a white substrate in one layer allows for reducing the colour difference on the coloured samples, but is insufficient for accurate colour reproduction. The study found, that the misalignment of the ink layers is 0.12 mm, which is generally within specification tolerances, but the imprints show a white outline visible to the naked eye. A visual assessment of the corporate colour under study revealed contamination with another ink, mainly magenta; the paper presents possible causes of the detected contamination. Based on the research results, it can be concluded, that determining the influence of the properties of printed materials on the optical indexes of imprints will allow manufacturers to adjust their technological processes in order to obtain products of the predicted quality.