Simultaneous contrast in screen printed patterns

The paper investigates the visual color change that occurs on a sample screen-printed with printing paste of identical composition containing pigment CHT Colormatch 740 Schwarz in the mass of 30 g of pigment per 100 g of total printing paste mass. After applying the same printing paste on textile substrate coloured in black and magenta hues, a visual difference in color appearance occurred between the samples. While on a magenta background the print looks completely black, on a black background the visual appearance of the color is much lighter. Screen-printing was carried out for the purpose of patterning the materials for the designer collection of backpacks, and a similar effect was achieved when applying printing pastes in magenta hue. In addition to visual analysis, color objectification was performed on the samples based on spectrophotometric measurement and presentation of results according to the CIELAB evaluation system and through the values of color depth K/S. Microscopic imaging of the surface was performed to assess surface coverage and layer uniformity, and in the process of visual analysis, not only the impact of the substrate was assessed, but also of the surrounding colors (contours).