PROBLEM TO BE SOLVED: To provide a discoloration aromatic material which can confirm a time limit of aroma by color change, can clearly discriminate an expiration date by visual inspection, and is rich in practicability.SOLUTION: A discoloration aromatic material 1 has a porous layer 3 to which a low-refractive-index pigment such as silicic acid and hydrophobic silica produced by a wet method is bound to a binder resin in a dispersed state, and that is opaque in a non-water absorption state and turns transparent in a water-absorbed state, on a support 2, and an aromatic liquid made from perfume, water, an organic solvent, and has a medium selected from water and a water-soluble organic solvent contained in the porous layer.SELECTED DRAWING: Figure 1【課題】 芳香の期限を色変化により確認でき、目視により明瞭に使用期限を判別可能な実用性に富む変色性芳香材を提供する。【解決手段】 支持体2上に、湿式法により製造される珪酸や疎水性シリカ等の低屈折率顔料をバインダー樹脂に分散状態に固着させた、非吸液状態で不透明であり、吸液状態で透明化する多孔質層3を備えてなり、前記多孔質層中に香料と、水、有機溶剤、水と水溶性有機溶剤から選ばれる媒体とからなる芳香液を含んでなる変色性芳香材1。【選択図】 図1
