Duplex Board Paper， As a common type of paper in the printing and office industries, it is highly favored for its unique characteristics and wide range of applications. It does not refer to paper made by bonding two types of adhesives, but rather refers to printing paper that has undergone surface gluing treatment to give it a smooth and flat surface. Understanding the features of Duplex Board Paper helps us better select and utilize it to meet different needs.

The most notable feature of Duplex Board Paper is its smooth surface

This surface is achieved by applying a layer of adhesive during the paper manufacturing process. The function of the sizing agent is to fill the fiber gaps on the surface of the paper, making it smoother, thereby improving the adhesion and color rendering of the ink on the paper. This means that duplex boards can present clear and vivid printing effects, and are therefore often used for printing books, magazines, brochures, posters, and other printed materials that require high printing quality.

Duplex Board Paper has good ink absorption and water resistance

This is due to the use of sizing agents, which can moderately absorb ink, prevent ink diffusion from causing blurring, and to some extent prevent moisture penetration, improving the durability and stability of paper. This allows duplex paper to maintain a good state even after long-term use and storage.

The characteristics of Duplex Board Paper also determine its limitations

Compared to other types of paper such as newspapers, duplex cardboards have relatively higher costs. This is because its manufacturing process is more complex and requires additional gluing steps. Therefore, in cost sensitive application scenarios, such as large-scale newspaper printing, Duplex Board Paper may not be the best choice.

In addition, although duplex cardstock has some water resistance, its tear strength is not outstanding. In situations where greater tensile strength is required, such as packaging materials, it is necessary to consider choosing other more resilient paper.

In summary, Duplex Board Paper plays an important role in the printing and office fields due to its smooth surface, good ink absorption, and water resistance. Understanding its characteristics helps us to choose suitable paper according to actual needs, in order to achieve the best printing effect and user experience. Although its cost is relatively high, its excellent printing quality and applicability make it the first choice for many professionals. In the future, with the continuous development of papermaking technology, we have reason to believe that Duplex Board Paper will play its unique value in more fields.

Duplex Board Paper   FAQs 

What is Duplex Board Paper?

Duplex Board Paper is a type of hard cardboard made by combining two or more layers of pulp, typically with a smooth surface (coated or uncoated) and a rough bottom layer to enhance stiffness. Divided into:

Grey Back Duplex: Surface white, bottom gray (recycled slurry).

White Duplex: Both sides are white (bleached wood pulp).

Widely used in the fields of packaging, printing, and stationery.

What are the main uses of Duplex Board?

Packaging box: A high-end gift box for cosmetics, pharmaceuticals, and electronic products.

Printing materials: book covers, business cards, greeting cards, hang tags.

Stationery supplies: folders, photo album pages, notebook covers.

Display materials: billboards, menus, display rack substrates.

What are the advantages of Duplex Board Paper compared to other types of cardboard such as single copper and corrugated paper?

High stiffness: Multi layer structure resistant to bending, suitable for delicate packaging.

Good printing adaptability: The surface is smooth and suitable for high-end processes such as offset printing and UV printing.

Cost balance: Cheaper than all wood pulp white card, more upscale than corrugated paper.

Environmental friendliness: Some use recycled fibers that are biodegradable.

What are the key steps in the production process of Duplex Board Paper?

1. Slurry preparation: surface layer (bleached white pulp)+bottom layer (mixed waste pulp).
2. Multi layer copying: By using a multi circular mesh paper machine to form and composite layers in layers.
3. Surface coating (optional): Apply kaolin or calcium carbonate to improve smoothness.
4. Polishing treatment: enhances surface gloss and flatness.
5. Cut and Curl: Cut into rolls or flat sheets according to customer needs.

What is the current market trend for Duplex Board Paper?

Sustainable packaging: The proportion of recycled fibers is increasing, and the demand for FSC certification is growing.

Lightweight: Reduce weight (such as 250400gsm) while maintaining strength.

Functional coating: special paperboard such as oil resistant, moisture-proof, and antibacterial has emerged.

E-commerce driven: Online sales of luxury goods and electronic products drive demand for high-end packaging.