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Natural (Brown) Kraft Linerboard

Review Custom Natural (Brown) Kraft Linerboard as a reference for your packaging brief. Confirm the material, dimensions, finish and intended use for the proposed specification.

Overview

Corrugated Board Process

Corrugated Board Process

Flute Types & Formation

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 in 23 lbs/in 52 lbs/m sq ft 20 lbs 40 in
150 lbs/sq in 26 lbs/in 66 lbs/m sq ft 35 lbs 50 in
175 lbs/sq in 29 lbs/in 75 lbs/m sq ft 50 lbs 60 in
200 lbs/sq in 32 lbs/in 84 lbs/m sq ft 65 lbs 75 in
250 lbs/sq in 40 lbs/in 111 lbs/m sq ft 80 lbs 85 in
275 lbs/sq in 44 lbs/in 138 lbs/m sq ft 95 lbs 95 in
350 lbs/sq in 55 lbs/in 180 lbs/m sq ft 120 lbs 105 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 in 42 lbs/in 92 lbs/m sq ft 80 lbs 85 in
275 lbs/sq in 48 lbs/in 110 lbs/m sq ft 100 lbs 95 in
350 lbs/sq in 51 lbs/in 126 lbs/m sq ft 120 lbs 105 in
400 lbs/sq in 61 lbs/in 180 lbs/m sq ft 140 lbs 110 in
500 lbs/sq in 71 lbs/in 222 lbs/m sq ft 160 lbs 115 in
600 lbs/sq in 82 lbs/in 270 lbs/m sq ft 180 lbs 120 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 in 67 lbs/in 168 lbs/m sq ft 240 lbs 111 in
900 lbs/sq in 80 lbs/in 222 lbs/m sq ft 260 lbs 115 in
1100 lbs/sq in 90 lbs/in 264 lbs/m sq ft 280 lbs 120 in
1300 lbs/sq in 112 lbs/in 360 lbs/m sq ft 300 lbs 125 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 in 26 lbs/in 66 lbs/m sq ft 35 lbs 50 in
200 lbs/sq in 32 lbs/in 84 lbs/m sq ft 65 lbs 75 in

Corrugated Strength Tests

flute grades

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.

Colors on Kraft with White Ink Behind

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.

Ink Colors 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.