Color fading/discoloration preventive agent

摘要

Disclosed are a color fading/discoloration preventive agent containing as its active ingredient a coumarin analog represented by general formula (1) below, a glycoside of that analog, or a plant extract containing the coumarin analog or its glycoside: (wherein R<1> represents a hydrogen atom, a hydroxyl group or a methoxy group, R<2> represents a hydrogen atom or a hydroxyl group, and R<1> and R<2> are not both hydrogen atoms); and a color fading/discoloration preventive agent containing as its active ingredient a coumarin analog mixture obtained from the rind of citrus fruit, and particularly a coumarin analog mixture obtained from citrus cold press oil. The color fading/discoloration preventive agent according to the present invention demonstrates superior color fading/discoloration preventive effects and can be supplied inexpensively by a simple preparation method. In addition, the color fading/discoloration preventive agent provided by the present invention is friendly to the environment and people.