PROBLEM TO BE SOLVED: To provide a pack that has excellent foaming power of carbonic acid gas, fast disappearance of foam, and excellent storage stability of powder, less undissolved powder, low irritation to skin, and furthermore excellent moist feeling after use.SOLUTION: A sheet-like pack kit contains (A) to (C) below: (A) acid solution containing organic acid; (B) powder containing carbonate; and (C) sheet-like substrate, in which (A) to (C) are brought into contact when in use to allow (C) to carry carbonic acid gas generated by neutralization reaction of organic acid and carbonate, and foam of carbonic acid gas formed above the liquid level of (A) disappear within 5 minutes after the neutralization reaction.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】炭酸ガスの発泡の勢いがよく、泡の消失が速く、また、粉末の保存安定性に優れ、粉末の溶け残りがなく、皮膚への刺激が低く、さらに、使用後のしっとり感に優れたパックを提供すること。【解決手段】 次の(A)~(C); (A)有機酸を含有する酸性溶液 (B)炭酸塩を含有する粉末 (C)シート状基体を含み、使用時に、(A)~(C)を接触させて、有機酸と炭酸塩の中和反応により発生した炭酸ガスを(C)に担持させるものであり、(A)の液面より上に形成される炭酸ガスの泡が中和反応後5分以内に消失することを特徴とするシート状パックキット。【選択図】なし