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Abstract
A precise, inexpensive and relatively fast method for determining the solubility of pleochroic dyes in liquid cyrstals is described. The method has been used to investigate the solubility of two anthraquinone dyes in liquid crystals of different molecular structure. The solubility of the dye is found to be strongly dependent on the molecular structure of the dye and that of the host liquid crystal. Also the temperature dependence of the solubility in the nematic phase has been found to be different from that in the isotropic phase of the liquid crystals. At the nematic isotropic phase transition temperature a discontinuity in the solubility curve has been observed.