Paper Specification

Layer and Flute of corrugated box (carton)

3 layers corrugated box (A)

3 layers corrugated box or carton is suitable for light-to-medium weight product or product that not need high protection. 3 layers corrugated box consists of a fluted corrugated sheet and 2 flat liner boards.

5 layers corrugated box (B)

5 layers corrugated box or carton is suitable for heavy product or product that need high protection. 5 layers corrugated box consists of 2 fluted corrugated sheets and 3 flat liner boards.

Flute Thickness (approximately) Attribute
E 1.5 mm

Size: mini

Good for: small box, special design box, premium products

B 2.5 mm

Size: small

Good for: light weight product

C 3.5 mm

Size: medium

Good for: medium weight product

BC 2.5 + 3.5 mm

Size: large

Good for: heavy product, creating large strong boxes


Corrugated Paper Grades

Grade Color Details
KS170

Clean white paper, good for premium products that need beautiful containers, and increasing brand value

Paper weight: 170 grams

KA125
KA150
KA185
KA230

Brown-gold paper, good strength, commonly used in Thailand,  good for boxes that need strength, and suitable for export products

Paper weight: 125, 150, 185, 230 grams

KI125
KI150
KI185

Light-brown paper, good for boxes that need to emphasize printing color, only inferior to KS, commonly used in Thailand

Paper weight: 125, 150, 185 grams

KT125
KT150
KT200

Brown paper, Recycled paper, low price, good for green products

Paper weight: 125, 150, 200 grams

CA or M

Brown rough paper, used for making flute sheets, also commonly used for making inner sheet of the box to save cost as the price of CA is cheap

Paper weight: 125 grams


Paper code used for ordering corrugated box

After understanding layers, flutes, and paper grade, you will understand paper code easily.

For examples:

1.) KA150/KA125 3 Layers C Flute

means outer sheet of the corrugated box is KA paper, weight 150 grams. Inner sheet of the corrugated box is KA paper, weight 125 grams. This box has 3 layers with C flute.

2.) KS170/CA125 5 Layers BC Flute

means outer sheet of the corrugated box is KS paper, weight 170 grams. Inner sheet of the corrugated box is CA paper, weight 125 grams. This box has 5 layers with BC flute.

3.) KI150/KI125 5 Layers BC Flute

means outer sheet of the corrugated box is KI paper, weight 150 grams. Inner sheet of the corrugated box is KI paper, weight 125 grams. This box has 5 layers with BC flute.