An electrochromic composition is composed of a solvent, an electrochromic compound having a high solubility to the solvent, and a compound selected from a group of ammonia, organic amine and alkali. The solubility of the electrochromic compound to the solvent is not less than 10.sup.-2 mol/100 g-solvent...http://www.google.com.au/patents/US4210390?utm_source=gb-gplus-sharePatent US4210390 - Electrochromic composition and electrochromic display device using same
