PROBLEM TO BE SOLVED: To provide a retort fluid food with high concentration suppressed in generation of brown extraneous matter when subjected to retort sterilization in a production process of the retort fluid food with high concentration so as to keep its commercial value, not spoiling taste and flavor inherent in the food, and being encapsulated in a container such as a soft bag: and to provide a method for producing the food.SOLUTION: The method for producing the retort fluid food with high concentration comprises encapsulating a highly concentrated fluid food composition with at least 1 kcal/ml in a packaging container, and replacing the head space of the container to a gas composition containing at least 80 wt.% of carbon dioxide followed by subjecting the food to retort sterilization.COPYRIGHT: (C)2007,JPO&INPIT【課題】 高濃度レトルト流動食品の製造過程におけるレトルト殺菌時の褐色付着物の発生を抑制して、商品価値を維持し、かつ食品本来の食味・風味を損なわない、ソフトバッグなどの容器に封入された高濃度レトルト流動食品及びその製造方法を提供することを課題とする。【解決手段】 少なくとも1kcal/mlの高濃度流動食品組成物を包装容器に封入し、そのヘッドスペースを、二酸化炭素を少なくとも80%含んでなるガス組成物にて置換した後にレトルト殺菌処理を行う。【選択図】 なし
