To carry out caging of a preliminarily moisturized food so as not to cause color streak in packaged food and produce accumulation of smoke in a food packing apparatus and impart the same coloring power and flavor to a food similar to that of alkali smoke covered with a conventional preliminarily moisturized food caging to foods.

This preliminarily moisturized tubular cellulosic film food caging is obtained by covering a preliminarily moisturized food caging with an alkali liquid smoke. The food caging has ≥24 wt.% water content and has a coat of smoke solution containing smoke tar and has at least 12, preferably about solution pH of about ≥12.5. The water content is preferably 25-40 wt.%, most preferably 25-30 wt.%.