| http://www.w3.org/ns/prov#value | - of its aspects, the present invention is a solution, for use as the variable transmittance medium in a single-compartment, self-erasing, solution-phase electrochromic device, which comprises:(A) a solvent;(B) at least one cathodic electrochromic compound which, in a voltammogram done with an inert electrode in the solvent at room temperature, displays at least two chemically reversible reduction
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