Pitch Dependence on Composition in Mixtures of Liquid Crystals

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Abstract
The linear additive law for pitch dependence in binary mixtures of cholesterics (or combinations of ingredients producing cholesterics) is extended to include first order interactive effects. The resulting expression is shown to effectively treat an apparently widely diverse collection of experimental data. The knowledge of the functional form of any given system is of value in predicting pitch sensitivity to heat, vapor, etc.