Graphite dispersion. 1. Spectrocolorimetric characterization

The aim of the present study is to characterize from the spectrocolorimetric point of view the graphite films dispersed in epoxy, chloral-rubber, polyurethane and acrylic resins. By using a HunterLab system the remission spectrum in the visible light spectrum (400-700 nm) of the resulted films was measured. With special programs, from the spectrum were calculated the color parameters L*, a*, b*, C*, h*, the total color differences in three chromatic color units Delta E*, Delta E-cmc the three chromatic coordinates X, Y, Z, the chromaticity coordinate y, black index (without coloured undertone) of the films My and black shade index (contribution of the coloured undertone), dM.