Abstract: This invention relates to novel designs of tray lids and tray bases for modified atmosphere packaging of fresh fruit, vegetables and cut flowers. More particularly, this invention relates to novel designs of landscaped lids and corresponding tray bases which enable cooling air to be circulated in single or multiple directions through stacked lid and tray combinations that contain fresh fruits, vegetables and cut flowers in a modified atmosphere environment. The gas-permeable modified atmosphere package comprises a lid constructed of a polymer, the lid having on the top surface thereof at the mid-regions of each side a plurality of raised load supports and in between grooves; and a base with a hollow interior constructed of corrugated kraft paper polymer and having a configuration at the top edges which conforms with the interior profile of the lid; the grooves enabling air to be circulated over the lid when one package combination is stacked on another.

Abstract: This invention relates to novel package systems for refrigerated modified atmosphere packaging of fresh fruit, vegetables and cut flowers. More particularly, this invention relates to the design, construction, closure, sealing and use of gas-permeable paperboard package systems and shipping trays for prolonging the storage life of fresh fruits, vegetables and cut flowers under modified atmosphere in the headspaces of the closed package system. A gas permeable paperboard comprising: (a) a first layer of kraft paper; (b) a layer of polymer having a gas permeability which permits gas to be transmitted through the polymeric film at prescribed levels; (c) a second layer of kraft paper, said first and second layers of kraft paper sandwiching the polymer between them.

Abstract: This invention is a novel composition for preserving fresh cut apples comprising a mixture of ascorbic acid, and one or more of calcium chloride, calcium carbonate, magnesium chloride, calcium hydroxide, and optionally, citric acid or sodium citrate. This invention also relates to a method of preserving fresh cut apples by treating the cut apples with the novel composition dissolved in water and packaging the treated fresh cut apples in a modified atmosphere package.