PURPOSE: To obtain the title product being readily produced and handled, not contaminating foods by a freshness preserving solution by sticking films having impermeability to the freshness preserving solution to both sides of an adsorbing sheet to give an adsorbing material and adsorbing the freshness preserving solution from the periphery of the adsorbing material on the adsorbing material.

CONSTITUTION: First, films 2 such as polyethylene films, having impermeability to freshness preserving solution are stuck to both sides of an adsorbing sheet 1 consisting of nonwoven fabric made of natural pulp, etc., to give an adsorbing material 3. Further, the freshness preserving solution is adsorbed from the periphery of the adsorbing material 3 on the adsorbing material to give the aimed product. Ethyl alcohol is preferable as the freshness preserving solution in the case of storing foods.