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Abstract
It is found that the two ferroelectric liquid crystal mixtures ZLI-3774 and FELIX-004 give identical cone angles between the relaxed states in the SSFLC geometry on all tested surface alignment layers, but the cone angle will change with the nature of the surface. On two of the layers a number of fluids are tested, and within experimental errors all give the same cone angle irrespective of their smectic C tilt or composition.