1. The knife and fork sign is a food safety sign. If there is a knife and fork mark on daily necessities that come into contact with food, it means that the product has passed testing and complies with many German and European standards, complies with the requirements of German LFGB regulations, and proves that it does not contain toxic substances that are harmful to the human body. It can be sold in Germany and other countries. Sales in European and American markets.
2. What you are talking about is not the grade of plastic cups, but that all plastic products are divided into 7 grades. It is usually at the bottom and consists of a triangular arrow. The number inside is the grade of plastic used. You can check the status of plastic products used around you.
1~3 are non-recyclable and reusable. 4~7 are recyclable and reusable.
1: Disposable beverage bottles
2: Disposable plastic bags
3: PVC engineering materials
4: PE low density Polyethylene
5: PP polypropylene
6: PS polystyrene
7: Other categories - PC, PEI+PET (this is a whole , a patented product specially developed by American General Company, which can withstand high temperatures of 180)