How Corrugated Boxes Are Made: From Paper to Custom Packaging

Corrugated boxes are used across almost every industry, from e-commerce and retail to manufacturing and logistics. They protect products during storage and transit, help reduce damage and provide a cost-effective and sustainable packaging solution.

But have you ever wondered how corrugated boxes are actually made?

In short: Corrugated boxes are made by bonding a fluted paper layer between liner boards to create corrugated board. The board is then cut, scored and converted into finished boxes using specialist box-making machinery. Modern systems allow custom-sized boxes to be produced on demand with minimal waste.

Many people assume a cardboard box is simply folded from a sheet of cardboard. In reality, corrugated packaging is engineered to provide strength, durability and protection while remaining lightweight and recyclable.

In this guide, we’ll explain how corrugated boxes are manufactured, the different materials involved and how modern machinery enables businesses to create custom-sized packaging quickly and efficiently.

How Corrugated Boxes Are Made in 5 Simple Steps

1. Paper is produced from recycled or virgin fibres.
2. The paper is corrugated to create a fluted layer.
3. The fluting is bonded between liner papers.
4. The corrugated board is cut and scored.
5. The board is folded and converted into finished packaging.

What Is a Corrugated Box?

Before understanding how a corrugated box is made, it is important to understand what makes it different from ordinary cardboard.

Corrugated board consists of:

• An outer liner
• A corrugated fluted layer
• An inner liner

The fluted middle layer creates strength while keeping the material lightweight.

This unique structure gives corrugated packaging its excellent:

• Compression strength
• Impact resistance
• Stacking performance
• Protection during transit

The combination of strength, flexibility and sustainability is why corrugated packaging remains one of the most widely used packaging materials in the world.

Step 1: Manufacturing the Corrugated Board

The process begins with paper.

Specialist papers are produced from recycled fibres, virgin fibres or a combination of both.

These papers are then fed through corrugating machinery where the fluted layer is created.

The fluting is formed by passing paper through heated rollers which create the distinctive wave-shaped profile.

This fluted material is then bonded between liner papers using starch-based adhesives to create corrugated board.

Depending on the application, manufacturers can produce different types of corrugated board.

Single Wall Corrugated Board

Single wall board consists of:

• One fluted layer
• Two liner boards

It is commonly used for:

• E-commerce packaging
• Retail products
• Lightweight goods
• Subscription boxes
• General shipping boxes

Double Wall Corrugated Board

Double wall board consists of:

• Two fluted layers
• Three liner boards

This creates a stronger structure designed for:

• Heavy products
• Industrial goods
• Export packaging
• Long-distance transportation
• Long or awkwardly shaped items

The additional layer provides greater strength, rigidity and protection against impacts and compression.

Step 2: Selecting the Correct Board Grade

Not all corrugated board is the same.

The board grade selected depends on factors such as:

• Product weight
• Product dimensions
• Product shape
• Fragility
• Transit conditions
• Stacking requirements

For example, a lightweight but long product such as a cricket bat may require a stronger board grade than a heavier but compact product because longer boxes experience greater flexing and handling stresses during transport.

Selecting the correct board grade ensures products are protected without adding unnecessary packaging costs.

Step 3: Converting Corrugated Board into Boxes

Once the corrugated board has been manufactured, it can be converted into packaging.

Traditionally, this process involved producing large quantities of standard-sized corrugated board using fixed tooling. These sheets would then be supplied to converters or manufacturers who would process them into finished packaging.

Modern packaging production has changed significantly.

Today, businesses increasingly require:

• Short production runs
• Custom dimensions
• Rapid turnaround times
• Reduced stock holding
• Sustainable packaging solutions

This is where advanced box-making technology plays an important role.

How ASC Direct Manufactures Custom Corrugated Boxes

At ASC Direct, we have invested in advanced box-making machinery that allows us to manufacture bespoke corrugated boxes efficiently and accurately.

Our investment in the BM2508Pro and BM1800 Mini box-making systems has expanded our ability to produce custom packaging solutions across a wide range of industries.

Unlike traditional conversion methods that often rely on dedicated tooling and large production volumes, our box-making systems allow us to manufacture bespoke packaging directly from corrugated board.

This allows businesses to order boxes that fit their products precisely without needing to commit to excessive stock quantities.

The Role of Our BM2508Pro Box-Making Machine

The BM2508Pro allows us to manufacture custom corrugated boxes directly from corrugated board sheets.

The machine automatically:

• Cuts board to size
• Scores fold lines
• Creates box designs
• Produces bespoke packaging on demand

This flexibility allows us to manufacture a wide range of packaging styles while maintaining accuracy and consistency.

The result is packaging that is tailored specifically to the customer’s product dimensions.

The Benefits of Bespoke Box Manufacturing

Custom-sized packaging offers several advantages over standard stock boxes.

Improved Product Protection

A box that closely matches the product dimensions reduces movement during transit and helps minimise damage.

Reduced Packaging Waste

Using the correct box size often reduces the need for excessive void fill materials.

Lower Shipping Costs

Smaller, right-sized packaging can help reduce dimensional shipping charges.

Better Sustainability

Less wasted material and reduced void fill contribute to a more sustainable packaging solution.

Greater Storage Efficiency

Businesses no longer need to stock multiple standard box sizes when bespoke packaging can be produced to their exact requirements.

The Importance of Accurate Dimensions

One of the most common causes of packaging problems is selecting the wrong box size.

A box that is too large allows products to move during transit.

A box that is too small may place pressure on the product or require excessive force during packing.

This is why ASC Direct’s Box Builder uses internal dimensions.

By entering the exact internal dimensions required, customers can create packaging designed specifically around their products.

This helps improve protection while reducing packaging waste and shipping inefficiencies.

Step 4: Cutting, Scoring and Folding

Once the design has been created, the corrugated board is cut and scored.

Scoring creates controlled fold lines that allow the board to be folded accurately without damaging its structure.

The finished blank is then folded and assembled into the final box shape.

Depending on the design, additional features may be incorporated, including:

• Internal fittings
• Dividers
• Inserts
• Protective packaging features

Step 5: Packing and Distribution

Once assembled, corrugated boxes are ready for use.

Products are packed into the box, sealed and prepared for storage or distribution.

The correct combination of box size, board grade and internal protection helps ensure products arrive safely at their destination.

Why Corrugated Packaging Remains the Industry Standard

Corrugated packaging continues to be the preferred packaging solution for businesses because it combines:

• Strength
• Versatility
• Sustainability
• Cost-effectiveness
• Recyclability

Whether protecting a single online order or shipping industrial components across the country, corrugated packaging remains one of the most reliable packaging solutions available.

Need Custom Corrugated Boxes?

At ASC Direct, we manufacture bespoke corrugated boxes designed around your products.

Using our Box Builder, you can specify your exact internal dimensions and create packaging tailored to your requirements.

Whether you need a single wall box for e-commerce orders or a heavy-duty double wall solution for industrial applications, our team can help.

Use our Box Builder today or contact us to discuss your packaging requirements.

Frequently Asked Questions

What are corrugated boxes made from?

Corrugated boxes are made from liner paper and a fluted paper layer bonded together to create a strong but lightweight packaging material.

What is the difference between cardboard and corrugated board?

Corrugated board contains a fluted layer between liner boards, giving it significantly greater strength than standard cardboard.

Why are corrugated boxes so strong?

The fluted structure acts like a series of support columns, providing excellent strength while keeping the material lightweight.

Are corrugated boxes recyclable?

Yes. Corrugated packaging is widely recyclable and is one of the most sustainable packaging materials available.

Can corrugated boxes be made to custom sizes?

Yes. ASC Direct’s Box Builder allows customers to create bespoke corrugated boxes using their exact internal dimensions.

What machines are used to make custom corrugated boxes?

Custom corrugated boxes can be produced using specialist box-making machines that cut, score and convert corrugated board into finished packaging. ASC Direct uses advanced box-making systems including the BM2508Pro and BM1800 Mini.

James Palfrey-Smith is the General Manager at ASC Direct with extensive experience in both operations and sales. James is passionate about solving packaging problems, delivering fast customer support, and building lasting relationships. Outside of work, he enjoys outdoor activities like hiking and skiing. A fan of real ale and business podcasts, he continuously seeks personal and professional growth. 

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