PROBLEM TO BE SOLVED: To provide an indicator that prevents close contact of the indicator with a gas-permeable package to ensure accurate detection even in the case of performing hydrogen peroxide sterilization treatment or hydrogen peroxide plasma sterilization treatment when a material to be processed and the indicator are packed and sealed in the gas-permeable package.SOLUTION: An indicator for detecting hydrogen peroxide sterilization or hydrogen peroxide plasma sterilization has a color-changing layer formed on a base material the color of the layer changes in the presence of hydrogen peroxide or hydrogen peroxide plasma. The color-changing layer has a surface roughness Ra of 2.5 to 15.0 &mum.COPYRIGHT: (C)2012,JPO&INPIT【課題】気体透過性包装体に被処理物とインジケーターを装填・密封し、過酸化水素滅菌処理又は過酸化水素プラズマ滅菌処理を行う場合であっても、インジケーターが気体透過性包装体に密着せず、正確な検知が可能なインジケーターを提供する。【解決手段】基材上に過酸化水素又は過酸化水素プラズマの存在下で変色する変色層を有する過酸化水素滅菌又は過酸化水素プラズマ滅菌検知インジケーターであって、前記変色層の表面粗さRaが2.5~15.0μmの範囲であることを特徴とするインジケーター。【選択図】なし
