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 bending rigidity E(f) and E(s) of the sheet materials that respectively form the first and second inner containers is 0.15-3.0gf.cm2/cm or less the ratio E(f)/E(s) of E(f) to E(s) is 0.3-5, inclusive the viscosity V(f) of the first agent is 10,000-145,000mPa.s the viscosity V(s) of the second agent is 8,000-100,000mPa.s V(f)/V(s) is 1.5-5 and the ratio M(s)/M(f) of the mass M(s) inside the second inner container to the mass M(f) inside the first container is 1.2-3.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,形成第1及第2內容器之片材之彎曲剛性E(f)及E(s)為0.15~3.0 gf・cm2/cm以下,E(f)與E(s)之比率E(f)/E(s)為0.3以上且5以下,第1劑之黏度V(f)為10,000~145,000 mPa・s,第2劑之黏度V(s)為8,000~100,000 mPa・s,V(f)/V(s)為1.5~5,第2內容器內之質量M(s)與第1內容器內之質量M(f)之比M(s)/M(f)為1.2~3。無
