When tomato fruit was paked with polyethylene film, the ripening was retarded as thickness of the film, number of the fruit and the fuit size in the package increased, but it was inversely propotional to size of the film and air volume in the package. The atmosphere of 3-4% carbon dioxide and 10-11% oxygen concentration in the package seemed to be optimum condition for the control of the ripening of tomatoes.

トマトをポリエチレン袋で包装して密封すると, 追熟の進行の抑制にフィルムの厚さ, 包装果実量, 果実の大きさが比例し, フィルムの表面積, 袋内空気量が反比例した. そして袋内の炭酸ガスが3?4%, 酸素が10?11%がもっとも適当なガス組成のようであった.