Duplex Paper
Duplex is a type of paper, which is produced by high-tech production line-advanced surface coating technology. One side is bleached and coated for printing whilst the other is uncoated and unbleached making it suitable for packaging. Industrial packing usually uses it to make luxury rigid boxes requiring high stiffness in a variety of weights and sizes. In particular, Duplex is quite thick. Duplex board paper consists of two layers, which differ in both of ink color and texture.
Single side coated: this Duplex paper type is coated on one side. It normally weighs 210 gsm.
Weight of Duplex Paper
Usually, duplex paper has the most common weight in the range of 250 gms – 500 gms duplex paper.
Paper weight in g/m2: that is, according to the weight of a sheet of paper with an area of 1m2. For example, when it says 500 duplex paper, it means that 1 sheet of 1m2 paper has a weight of 500g.
Pros and Cons of Duplex paper
Pros of Duplex paper:
Packaging products such as boxes made from duplex paperboard will have vibrant and lively colors. This will help the overall product to appear more luxurious and elegant. The paper offers high rigidity that can be utilised for different packaging products of various sizes from large to small. Due to the high rigidity and durability, duplex paperboard boxes can offer high protection for the products inside.
Cons of duplex paper:
fter printing, a film is needed to be applied on top of the duplex paper to obtain the highest quality print.
Application of Duplex
Because of the outstanding paper stiffness, which is strong support for the box die-cutting process, and laminating hot stamping results. With its favorable properties, duplex paperboard is widely utilized in packaging and printing industry. Having the smooth, glossy surface, and the ability to be printed with vibrant colors, duplex paperboard is widely used in paper boxes. In particular, duplex boxes are usually made for following packaging boxes: food boxes, cosmetic products boxes, medicine boxes, gifts boxes…
| STT | Type of product | Quantitative | Thickness | Moisture content | cobb60 | The compressive strength | The shade | Brightness | Bursting strenght | |
| Horizontal | Vertical | |||||||||
| g/m2 | mm | % | g/m2 | kgf | kgf | % | % ISO | kgf/cm2 | ||
| 1 | DLC-200 | 200 ± 3% | ≥ 0.22 | 8.0 ± 0.5 | 35 ± 5 | ≥ 20 | ≥ 26 | ≥ 35 | ≥ 78 | ≥ 3.5 |
| 2 | DLC-230 | 200 ± 3% | ≥ 0.26 | 8.0 ± 0.5 | 35 ± 5 | ≥ 24 | ≥ 30 | ≥ 35 | ≥ 78 | ≥ 4.0 |
| 3 | DLC-250 | 200 ± 3% | ≥ 0.28 | 8.0 ± 0.5 | 35 ± 5 | ≥ 29 | ≥ 38 | ≥ 35 | ≥ 78 | ≥ 4.8 |
| 4 | DLC-300 | 300 ± 3% | ≥ 0.34 | 8.0 ± 0.5 | 35 ± 5 | ≥ 38 | ≥ 48 | ≥ 35 | ≥ 78 | ≥ 5.5 |
| 5 | DLC-350 | 300 ± 3% | ≥ 0.39 | 8.0 ± 0.5 | 35 ± 5 | ≥ 45 | ≥ 54 | ≥ 35 | ≥ 78 | ≥ 6.0 |
