Image: Heat Sealing Film for Permeability Test
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Description: In a study to test package film permeability and shelf life of fresh-cut produce, food technologist Yaguang Luo prepares to seal romaine lettuce.
Title: Heat Sealing Film for Permeability Test
Credit: USDA Image Number D539-1, http://www.ars.usda.gov/is/graphics/photos/jul06/d539-1.htm Transferred from en.wikipedia to Commons by User:Quadell using CommonsHelper.
Author: Photo by Peggy Greb.
Usage Terms: Public domain
License: Public domain
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