When it comes to packaging, the choice of material can make a significant difference in the product’s safety and protection. One commonly used packaging material is corrugated cardboard, which is made up of several layers of paperboard. The middle layer or the corrugated part is known as fluting, and it has a significant impact on the strength and durability of the cardboard. In this post, we’ll take a closer look at fluting in cardboard and how it improves packaging.

Understanding Fluting in Cardboard

Fluting is the wavy part or inner layer of corrugated cardboard that provides rigidity, strength, and insulation to a package. The flutes come in different shapes and sizes, which can affect the overall strength and durability of the cardboard.

Types of Flutes

There are several types of flutes that are commonly used in cardboard packaging. These include:

1. A-Flute

A-flute has the largest flutes, with around 33 flutes per foot. This flute is around 5mm thick, making it the thickest of all flutes, and offers excellent cushioning properties. A-flute is often used in packaging heavier products, such as appliances and electronics.

2. B-Flute

B-flute is the most common type of flute, with around 47 flutes per foot. It is thinner than A-flute and provides a smoother surface for printing. B-flute provides a balance of cushioning and stacking strength for packaging applications like food products, small appliances, and cosmetic items.

3. C-Flute

C-flute has around 39 flutes per foot, making it thicker than B-flute but thinner than A-flute. C-flute provides a higher stacking strength than B-flute and is often used in shipping boxes, retail displays, and e-commerce packaging.

4. E-Flute

E-flute is the thinnest type of flute, with around 90 flutes per foot. It provides excellent printability and is often used for high-quality graphics and small packaging applications such as cosmetics, food and drink products, and electronic gadgets.

Real-world Applications of Fluted Cardboard Packaging

Different industries use fluted cardboard in their packaging solutions to provide a high level of protection and safety. Here are a few examples:

1. The Electronics Industry

The electronics industry uses fluted cardboard packaging to protect fragile and sensitive components during shipping. The thick and cushioned A-flute is an excellent choice for providing maximum protection for electronic items like TVs, computers, and smartphones.

2. The Food Industry

The food industry uses fluted cardboard packaging for transporting and storing food products. C-flute cardboard packaging is an ideal choice due to its stacking strength and rigidity properties, which helps keep the food products fresh and secure.

Tips for Choosing the Right Fluting

Choosing the right fluting is crucial for the protection of the product inside the packaging. Here are some key things to consider when selecting the best fluting and thickness of cardboard:

  • Consider the weight and fragility of the product being shipped.
  • Determine the length of time the product needs to be stored or shipped.
  • Think about the environmental conditions during shipping and storage, such as temperature and humidity.

Benefits of Using Fluted Cardboard

There are several benefits of using fluted cardboard in packaging:

1. Eco-friendliness

Fluted cardboard is recyclable, biodegradable, and compostable, making it an eco-friendly packaging option.

2. Cost-effectiveness

Fluted cardboard packaging is an economical option compared to other packaging materials like plastic.

3. Ease of Use

Fluted cardboard is easy to handle, store, and assemble, making it a convenient option for businesses.


The type of fluting used in cardboard packaging can have a significant impact on the product’s protection and safety. A-flute provides excellent cushioning, while C-flute offers higher stacking strength. The electronics and food industries are just some examples of where fluted cardboard packaging is used to provide safe and secure shipping. Choosing the right fluting is crucial to the product’s safety and protection, and considering factors like weight, fragility, and environmental conditions is important. In summary, fluted cardboard packaging is an eco-friendly, cost-effective, and easy-to-use packaging option that provides excellent protection and safety for a range of products.