The present invention provides a sheet for PTP or blister package used to package pharmaceuticals, which has a component (A) mixed by an organic coloring pigment (a1) having an average particle diameter of 20 to 400 nm and a dispersant (a2) of a number average molecular weight of 100 to 3000, and a resin component (B), therefore it has an excellent dispersion in the organic coloring pigment (the organic coloring pigment is distributed evenly in the sheet), and can obtain the sheet for forming PTP or blister package (the sheet for PTP or blister package) to reduce bleeding of the organic coloring pigment (or without the bleeding).本發明之包裝醫藥品用的PTP用或泡殼包裝用薄片,係因含有混合具有20至400nm的平均粒徑之有機著色顏料(a1)與數量平均分子量為100至3000的分散劑(a2)而成之成分(A)、及樹脂成分(B),故在有機著色顏料中可發揮良好的分散性(在薄片中,有機著色顏料分布不均少),同時可得一種用以成形可減少發生有機著色顏料滲出(或是不發生該滲出)之PTP或泡殼包裝之薄片(PTP用或泡殼包裝用薄片)。
