Gardenia pigment preparation with acid resistance

摘要

PROBLEM TO BE SOLVED: To provide a gardenia red pigment formulation and a gardenia blue pigment formulation having acid resistance, especially a method for easily adding acid resistance to a pigment formulation containing a gardenia red pigment or a blue pigment regardless of manufacturing method of gardenia pigment raw materials.SOLUTION: To a gardenia pigment formulation containing a gardenia red pigment or a blue pigment and having color valency of 5 to 500, ghatti gum and/or arabic gum is added so that the content of the ghatti gum or the arabic gum satisfies following formula. Formula 1: Content of ghatti gum (mass%)(Color valency of gardenia pigment formulation)×0.005. Formula 2: Content of arabic gum (mass%)(Color valency of gardenia pigment formulation)×0.2. Formula 3: Content of ghatti gum (mass%)(Color valency of gardenia pigment formulation)×0.005×{/(+0.025)}, where is the content of ghatti gum in the gardenia pigment formulation (mass%), is the content of arabic gum in the gardenia pigment (mass%).