and safety and environmental protection are the development trend

grease-proof paper products are mainly classified according to oil-proof grade. common ones include grade 3 grease-proof paper, grade 5 grease-proof paper, grade 7 grease-proof paper, and grade 7 or above (grade 10, 11) grease-proof paper. the higher the oil-proof grade, the more oil-proof paper. the better the performance, the more expensive the product, and vice…