Introduced on five-layer structure

1, three strengthened: three layers of paper and hard, slightly hard, suitable for loading less, not afraid of pressure, or packaging of the product

2, three layers of special hardware: three layers of paper, hardness, smooth, suitable for gift packaging, close to the five-story strengthening pressure

3, five common: five layers of plain paper is not hard, suitable for packed weight is moderate, less resistance, hardness of the outer packaging no particular requirements for products

4, five-story strengthening: a five-storey corrugated hardening, hardness, and moderate pressure, suitable for high weight, valuables