PROBLEM TO BE SOLVED: To provide a hair dye capable of discharging foam having a high specific gravity by using a non-aerosol foamer container, in which the specific gravity of the foam is not lowered even when a rubbing-in operation is applied thereto over head hair.SOLUTION: In this hair dye containing a first agent containing an alkali agent and a second agent containing an oxidizing agent, and used in the foamy state, the ratio Y/X between the specific gravity (X) of the foam just after being discharged from a non-aerosol foamer container in which a gas-liquid mixing ratio is expressed as gas:liquid=13:1 and the specific gravity (Y) of the foam just after the foam is stirred under a specific stirring condition is in the range of 0.75-2.COPYRIGHT: (C)2012,JPO&INPIT【課題】ノンエアゾールフォーマー容器を用いて比重の大きな泡を吐出でき、頭髪上で揉み込み操作を加えても泡比重が低下しない染毛剤を提供する。【解決手段】アルカリ剤を含有する第1剤と酸化剤を含有する第2剤を含み、泡状にして用いる染毛剤であって、気液混合比が気体:液体=13:1のノンエアゾールフォーマー容器から吐出した直後の泡比重(X)と、その泡を特定の撹拌条件下で撹拌した直後の泡比重(Y)との比率Y/Xが0.75~2の範囲内である染毛剤。【選択図】なし
