Cellophane offers solution to quality food storage

In the early 1920s Du Pont held the U.S patented rights for Cellophane but also owned a problem that came along with it. Cellophane was ineffective for food packaging because water vapor was seeping in. It took William Hale Charch and his team of Du Pont researchers 2,000 test trials and a four–year commitment to realize their goal – a discovery and patent of an effective moisture-proofing process.