DEVELOPMENT AND ADAPTATION OF CONTROL AND TESTING METHODOLOGY OF COLOR GAMUT OF INDUSTRIAL ADDITIVE SYSTEMS
The article discusses the issue of the additive color reproduction systems control in engineering. Additive technologies provide a wide range of possibilities for the formation of a three-dimensional product with the colouring of the product as a whole. However, there is no technology for color management and control of distortion of the color formation of the cured material. In the course of study, the method of color management in the process of manufacturing a three-dimensional model using CJP (Color Jet Printing) or Binder Jetting technology is proposed in order to ensure consistent color communication in the CAD system "program - 3D printer - material". The paper introduces the concept of additive system in industry as a set of components that determine the properties of a finished product produced by the additive method. According to the proposed method, the authors determined the color coverage of the additive system based on the ZPrinter 450 installation of G-16 gypsum polymer materials and ZP-150, as well as an experimental assessment of the color difference between the declared and actual values of the color coordinates of the test sample. The authors state the decrease in the color difference between the actual and the reference values of color coordinates when using the proposed method. Colorimetric data show the effectiveness of the proposed method, which reduced the average color difference from 19.78 ΔЕ to 13.95 ΔЕ between the source and actual values of the colour coordinates of the fields of the test object based on TC 3.5 CMYK scale. In order to evaluate color coverage we carried out geometric modeling of the color coverage solids with additive systems of different compositions using Quick Hull algorithm. The research results prove that additive systems retain their properties with the constancy of their components, but changes in the composition of components change the parameters of finished products. It suggests that the actual task is to develop individual profiles of the system (colour profiles at this stage), which would describe the individual characteristics of the additive system. It allows comprehensive selection of operational modes.