It all starts with a sheet of paper when it comes to corrugated boxes.

corrugated boxes

Kraft paper and test paper are the two most common kinds of paper use in corrugated boxes. When it comes to the inside liner, test paper is often utilise, with Kraft paper being use for the exterior liner of the box.

Compared to test paper, kraft paper is more costly, but it is of superior quality.

Kraft paper is create from softwood trees such as pine, spruce, and fir, and is compose of 70-80% virgin chemical pulp fibre. Kraft paper is use in the production of packaging. It is available in a number of various colours and finishes, including brown, white, mottled, totally bleached, and birch faced.

Kraft paper also has a smoother texture than regular paper, which makes it easier to print on. It’s also more water-resistant, which means it’ll keep the contents of the bag safer for longer. Furthermore, it is more durable than test paper due to its better rip and burst resistance levels.

Oak, Sycamore, Birch, and Chestnut are examples of hardwood trees with short fibres, and test liners are often construct from these woods or from recycle paper. However, although test paper is less costly than kraft paper, it is less durable and more difficult to print on. As a result, test paper is often relegated to the interior of boxes, where it is less apparent to the eye.

Learn about the different Flute Grades for your corrugated boxes by reading this article.

Corrugated Boxes are distinguish from their cardboard counterparts by the flute (the wavy area sandwiched between the liner and the outer shell). The flute size controls the thickness of the box walls, as well as the stacking strength of the box, which is determine by the flute size. Flutes are designate by a letter that corresponds to the size of the flautist. The following are the most frequently seen flute sizes:


The A-Flute (33 flutes per linear foot):

is the biggest flute, measuring 1/4″ thick and measuring 33 flutes per linear foot. Because of its thickness, it provides a high level of protection and is an excellent choice for delicate things.

B-Flute (47 flutes per linear foot)

is 1/8″ thick and has 47 flutes per linear foot. This is far thinner than A-flutes, yet it is quite robust. It’s often used for counter displays and canning products. This flute is ideal for die-cut patterns because of its flexibility.

Thickness of C-Flute is 3/16″ (there are 39 flutes per linear foot). As the most common shipping box choice, this is the one you’re most likely acquainted with, which means you’ve probably used it before.

E-Flute (which has 90 flutes per linear foot)

is just 1/16″ thick, making it a relatively thin material. The smaller flute may not have as much strength as the bigger flutes, but it does have certain benefits over the larger flutes. When folding carton boxes, it may be used in place of paperboard in certain cases. Stores well and prints well. It’s a wonderful choice for printing.

F-Flute (125 flutes per linear foot)

is one of the thinnest flute grades, measuring 1/32″ thick and having a flute density of 125 per linear foot. It features an extremely smooth surface, which ensures that printed designs will seem crisp.

Choosing the Proper Wall Type for Custom Corrugated Boxes is important.

Even if you already know what flute size you want, there are a few more critical options to consider. Wall thicknesses for corrugated packaging are available in a variety of sizes. Sometimes you just need a little amount of protection for your items, while other times you want something more substantial. Here are the several types of walls you may choose from:

  • Single-face corrugate media is often offered in rolls and is comprise of a single sheet of liner adhered to a single sheet of corrugate medium. In the case of fragile products, it provides additional padding. If you’re sending anything fragile, such as wine glasses, you can consider using this as an extra layer of protection.
  • Single-wall corrugate medium is a single sheet of corrugated medium that is attach between two sheets of liner. If you think of a corrugated cardboard box, this is the one that comes to mind first and is most likely what you envision.
  • Double-wall construction is more robust, but it is also less flexible.

With three stacked corrugated sheets and four liner board facings, a triple-wall construction is the most durable option. Produce bins are occasionally use in conjunction with industrial equipment to create a finish product.


Corrugated boxes are available in a variety of packaging styles.

Finding the perfect corrugated packing box for your items is another crucial consideration when selecting the appropriate corrugated packaging box.

Corrugated boxes are available in a variety of forms and sizes. You don’t want to be force to pack your belongings, but you also don’t want them to float about in the water. It’s important to remember that the inside dimensions of a box are expressed as length x width x height when choosing a container size (L x W x H).

Here are some of the most popular box styles to pick from, each of which is available in a variety of sizes:

Regular Slotted Container (RSC)

is an acronym that stands for Regular Slotted Container. This is the most often encounter. Consider the traditional shipping container. When the box is close, all of the flaps are the same length, with the two outer-length flaps meeting in the centre of the box when it is shut. To keep the flaps in place, you’ll need tape.

Full Overlap Container (FOL):

This sort of box has increase strength due to the fact that both sets of outer flaps entirely overlap, resulting in the box being double-layer on both the top and bottom.

You’ve probably seen one of these boxes before if you’ve ever bought a book or other media products from a publisher or distributor. 

Full Telescope Design (FTD):

As the name implies, this box is comprise of a top and bottom that are independent from one another.  And fit over one another. Its twin walls provide it with additional strength.

By 12disruptors Admin

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