Keep It Fresh Grape Pads are used for the protection of table grapes during storage and shipping.
The pads have multiple layers with SO2 releasing chemicals in between. The grape pads poses unique fast and slow release mechanism.
We use micro-perforation to allow quick release of SO2 gas. The technology allows for water activation of the pads to quickly release SO2. Simply sprinkle water on the printed surface of the pad and the water or moisture can interact with the chemical inside for a faster and instant release of SO2 gas.
Post the quick release function KIF grape pads allow sustained release of sulfur dioxide from the sodium metabisulfite salt, contained between paper layers. Humidity inside the grape box reacts with this salt, thus generating sulfur dioxide (So2). The gas is then slowly released owing to the semi-permeable barrier, controlling the development and/or spreading of Botrytis cinerea, one of the main post-harvest diseases affecting table grapes.
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