Overview


Natural kraft board is made up of 80% virgin pulp fibre, making it up to 100% recyclable and biodegradable. This material is brown in color and offers optimal durability as well as tear and dust resistance, making it ideal for packaging products for shipping. Natural Kraft boards are in fact the industry standard for producing corrugated packaging, making this material readily available and fairly cost effective to produce. However, the brown color of this material may alter printing output to appear more muted or faded. Although, bleached white or Kemi white liner boards tend to be a little more costly, if your brand requires vibrant designs, considering the extra cost may be worth while.

Corrugated Board Process

Corrugated Board Process

Flute Types & Formation

Learn more about corrugated boards

Flute Types
Flute Types
Corrugated Formation
Corrugated Formation

Corrugated Board Performance

Single Wall

Min. Burst Strength
(lbs/sq in)
Min. Edge Crust Test
(lbs/in)
Min. Combined Weight of Facings
(lbs/m sq ft)
Max Weight of Box and Contents
(lbs)
Max Outside Dimensions
(L + W + D in)
125 lbs/sq in23 lbs/in52 lbs/m sq ft20 lbs40 in
150 lbs/sq in26 lbs/in66 lbs/m sq ft35 lbs50 in
175 lbs/sq in29 lbs/in75 lbs/m sq ft50 lbs60 in
200 lbs/sq in32 lbs/in84 lbs/m sq ft65 lbs75 in
250 lbs/sq in40 lbs/in111 lbs/m sq ft80 lbs85 in
275 lbs/sq in44 lbs/in138 lbs/m sq ft95 lbs95 in
350 lbs/sq in55 lbs/in180 lbs/m sq ft120 lbs105 in

Double Wall

Min. Burst Strength
(lbs/sq in)
Min. Edge Crust Test
(lbs/in)
Min. Combined Weight of Facings
(lbs/m sq ft)
Max Weight of Box and Contents
(lbs)
Max Outside Dimensions
(L + W + D in)
200 lbs/sq in42 lbs/in92 lbs/m sq ft80 lbs85 in
275 lbs/sq in48 lbs/in110 lbs/m sq ft100 lbs95 in
350 lbs/sq in51 lbs/in126 lbs/m sq ft120 lbs105 in
400 lbs/sq in61 lbs/in180 lbs/m sq ft140 lbs110 in
500 lbs/sq in71 lbs/in222 lbs/m sq ft160 lbs115 in
600 lbs/sq in82 lbs/in270 lbs/m sq ft180 lbs120 in

Triple Wall

Min. Burst Strength
(lbs/sq in)
Min. Edge Crust Test
(lbs/in)
Min. Combined Weight of Facings
(lbs/m sq ft)
Max Weight of Box and Contents
(lbs)
Max Outside Dimensions
(L + W + D in)
700 lbs/sq in67 lbs/in168 lbs/m sq ft240 lbs111 in
900 lbs/sq in80 lbs/in222 lbs/m sq ft260 lbs115 in
1100 lbs/sq in90 lbs/in264 lbs/m sq ft280 lbs120 in
1300 lbs/sq in112 lbs/in360 lbs/m sq ft300 lbs125 in

E-Flute

Min. Burst Strength
(lbs/sq in)
Min. Edge Crust Test
(lbs/in)
Min. Combined Weight of Facings
(lbs/m sq ft)
Max Weight of Box and Contents
(lbs)
Max Outside Dimensions
(L + W + D in)
150 lbs/sq in26 lbs/in66 lbs/m sq ft35 lbs50 in
200 lbs/sq in32 lbs/in84 lbs/m sq ft65 lbs75 in

Corrugated Strength Tests

Corrugated Strength Tests

Edge Crush Test (ECT)

Force is applied perpendicular to the edge of the corrugated board until it buckles. The results provide accurate representation of the material’s strength, durability and stack resistance for heavier loads. The resulting value is shown in pounds per linear inch of load-bearing edge and is reported in ECT ratings.

Note: 32 ECT is the most commonly used for corrugated material.

Bursting Test

The burst test, otherwise known as the Mullen Test, challenges the durability of the corrugated fiberboard’s surface. The burst test determines the amount of force required to puncture the liner board. The resulting value is given in pounds per square inch.

Note: 200# means 200 pounds per square inch of force applied to the face of the liner board.

Color Appearance On Kraft Board

Ink Colors on Kraft Paperboard

Ink Colors on Kraft Paperboard

Darker paper stock may alter the color output when printing, making them appear less vibrant and more muted in tone.

White Undercoat with Color

White Undercoat with Color

White ink can be used as a base on kraft paperboard to ensure colors appear more vibrant while still maintaining the true texture of kraft paper.

White Ink On Kraft Paperboard

White Ink On Kraft Paperboard

Using white ink on kraft paper creates a textured contrast on the material due to its natural fibers.


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