Kraft Paper Weight & Thickness Conversion
Kraft paper is made from the wood fibers of coniferous trees through a chemical pulping process, and finally formed into paper on a paper making machine. The thickness of kraft paper is measured in millimeters and gram/square meter. The following table shows the conversion methods.
| Thickness | mm | MIL |
| 28 g/m2 | 0.04 | 1.57 |
| 40 g/m2 | 0.06 | 2.36 |
| 50g/m2 | 0.06 | 2.36 |
| 60 g/m2 | 0.07 | 2.76 |
| 70 g/m2 | 0.08 | 3.15 |
| 80 g/m2 | 0.11 | 4.33 |
| 100g/m2 | 0.12 | 4.72 |
| 120 g/m2 | 0.13 | 5.12 |
Kraft paper has high tear resistance and aligns with natural, eco-friendly, and health-conscious principles, making it widely used in the food packaging industry. 40g/㎡ to 80g/㎡ foil lined kraft bags are common choices.
Kraft Paper Bags Features
Environmental Friendliness
As a kind of eco friendly packaging bags, Kraft paper is a renewable resource, typically made from wood pulp, and has good biodegradability. Using kraft paper bags helps reduce plastic pollution, aligning with modern society’s demands for environmental protection and sustainable development.
High Strength and Durability
Kraft paper has high tear and puncture resistance, capable of withstanding significant weight and pressure. This makes kraft paper bags particularly suitable for packaging heavy items or goods that require long-distance transportation.
Good Breathability
Kraft paper has a certain degree of breathability, which is beneficial for products that need to stay dry and fresh, such as food and agricultural products. Breathability prevents moisture buildup, thereby extending the shelf life of the products.
Cost-Effectiveness
Compared to some high-end packaging materials, kraft paper has lower production costs and readily available raw materials. This makes kraft paper bags an economical packaging choice.
Versatility
Kraft paper bags can be processed in various forms to meet different needs, such as thickening, laminating, and adding zippers, adapting to diverse packaging requirements. They can be used for food packaging, clothing packaging, gift packaging, and more.
Lightweight
Kraft paper bags are lightweight, making them easy to carry and transport, reducing logistics costs and energy consumption.
Kraft Paper Bags Colors
The main colors of kraft paper include natural (brown) kraft paper, red kraft paper, and white kraft paper. Any color effect can also be achieved through printing.
Customized Printing on Kraft Paper Bags
The surface of kraft paper is relatively rough, prone to shedding fibers, and has high ink and water absorption. Additionally, different brands and batches of kraft paper can vary in color depth. Therefore, achieving high-quality printing with accurate color reproduction is challenging.
To maintain 100% biodegradability of kraft paper bags, it is advisable to avoid using multi-color overprinting and complex gradient patterns in the design. Simple colors and clean styles are recommended. Below are some examples.
We can first print the design on the inside of a film and then laminate it onto the kraft paper, achieving a high-quality print. However, this approach compromises the texture of kraft paper, and the plastic film is difficult to recycle and degrade. You will need to choose between these options.
