Materials and processing technologies for a high quality color filter consisting of ammonium-dichromated gelatin (ADG) were studied. To achieve adequate characteristics of color reproducibility, the fixing process using tannic acid and potassium antimonyl tartrate and the thermal stability were investigated. The following results were attained: (i). It was clarified that the fixing process played two roles such as the strengthening of the binding force between gelatin and dye molecule, and prevention of a reaction between the remaining dyeing sites in gelatin and dye molecules. Careful control of
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