[Problem] The objective of the present invention is, in a cosmetic sheet product containing an acid-containing solution and a sheet substrate supporting a carbonate, to provide a formulation technology that uniformly and continuously causes the generation of minute bubbles of carbon dioxide.[Solution] In the cosmetic sheet product containing an acid-containing solution and a sheet substrate supporting a carbonate, by means of admixing a hydrophobically modified alkyl cellulose to the acid-containing solution, it is possible to provide a cosmetic sheet product that can uniformly and continuously generate carbon dioxide in the form of minute bubbles and to enjoy the effect of carbon dioxide when the solution is caused to impregnate the sheet substrate.
