At present, the solvent-based ink containing benzene is still the most widely used in China, while the amount of environmental protection ink is very small, so far there is no edible ink. Even if benzene-free environmental protection ink is used, the ink itself cannot directly contact food.
On June 1 2009, the Food Safety Law implemented in China listed food packaging materials and containers in the food safety category. At the same time, benzene solvents are not included in the National Hygienic Standard for Compulsory Use of Additives for Food Containers and Packaging Materials.
So, to sum up, don't pack newspapers. If you are worried that leafy vegetables will dry after being put in the refrigerator, it is recommended to use some white paper. When storing, spray some water on the leaves, and then put the leaves in the fresh-keeping room of the refrigerator with white paper in an upright position with the stems down, which can effectively prolong the storage time and keep them fresh.