“…Color stability is one of the common used parameters to evaluate the esthetics and to indicate the aging and the damage of the denture acrylic resin material after a period of service. Several factors effect on the color stability including the polymerization methods (43,56,(63)(64)(65)(66)(67)(68), the staining solutions (9-13, 64, 65, 70-75), the immersion period (9-12, 64, 65, 70-72), the denture base resins composition (9,13,34,39,76,77) and the usage of denture cleansers. (9, 63, 64, 78) 1.…”