Seedless grapes, 2 months refrigerated, pushing another

All varieties proved to store about 6 months in a porous bag as well as a plate with loose seran over the top. Plump grapes are a luxury and difficult to get storage environment perfect. I believe humidity should run around 70%-80% with air movement. Raisining occurs naturally over time when there is the perfect condition-NO decay! Raisins are certainly doable in a heated or solar dehydrater.