Non-toxic and safe. The plastic paper for quick-frozen scallion pancakes prevents the scallion pancakes from being squeezed during transportation. It is a plastic film or paper film that sticks together after melting. It is food-grade safe. Scallion pancake is a special snack, belonging to Fujian or Shandong cuisine. The main ingredients are flour and chopped green onion. It has a fragrant and salty taste and is a common delicacy on the streets and night markets.