The invention of a carton with freshness preservation effect

Fruits and vegetables placed at room temperature for too long, will soon rot. Recently, Japan has invented a carton that has the effect of freshness preservation, which greatly extends the lifespan of fruits and vegetables. The strawberries, which are dripping brightly, are placed in plain cartons and fresh-keeping carton boxes, respectively. After four days, the strawberries in the ordinary carton have become moldy. However, the inside of the fresh-keeping cartons is still intact.

The carton box invented was the carton factory in Fukushima Prefecture. Since the local area is a famous fruit producing area, the vice president of the carton company stated that the development of a fresh-keeping carton that can prolong the lifespan of fruits and vegetables can create a win-win situation for farm families and factories. Ethylene gas produced by fruits and vegetables itself is the culprit causing food spoilage. The secret of fresh-keeping cartons lies in the color printing of cartons that contain ethylene-absorbing substances. After repeated experiments, it was found that the powder of calcium carbide can not only absorb ethylene, but also dissolve in color ink.

At present, local farmers are packing and shipping apples harvested in the fall. They also started using fresh-keeping cartons to maintain the freshness of apples.