An aerosol-type cosmetic for use in hair coloring or hair decoloring and equipped with an outer container that houses a first inner container filled with a first agent that contains an alkali agent, and a second inner container filled with a second agent that contains hydrogen peroxide, wherein: the space between the outer container and the inner containers is filled with a propellant to an internal pressure of 0.2-0.8MPa the first and second inner containers are formed by adhering a multi-layered sheet material having a bending rigidity of 0.15-3.0gf.cm2/cm, the innermost layer of which is a polyolefin resin layer (bending resistance of sheet material of first inner container)/(bending resistance of sheet material of second inner container)=0.3-5 (first agent viscosity)/(second agent viscosity)=0.5-1.5 and (second agent mass)/(first agent mass)=no less than 0.8 and less than 1.2.本發明之噴霧型染毛用或毛髮脫色用化妝品具備如下外容器,該外容器收納填充有含有鹼劑之第1劑之第1內容器與填充有含有過氧化氫之第2劑之第2內容器,並且 於外容器與各內容器之間之空間中填充內壓0.2~0.8 MPa之噴射劑, 第1及第2內容器係貼合最內層為聚烯烴樹脂層之彎曲剛性0.15~3.0 gf・cm2/cm之多層片材而形成, (第1內容器之片材之彎曲剛性)/(第2內容器之片材之彎曲剛性)=0.3~5、 (第1劑之黏度)/(第2劑之黏度)=0.5~1.5、 (第2劑之質量)/(第1劑之質量)=0.8以上且未達1.2。無
