How to identify the material of cardboard boxes in printing factories?

The commonly used cardboard boxes in printing factories have three layers, five layers, and seven layers are less commonly used. Each layer is divided into inner paper, corrugated paper, core paper, and surface paper. The inner and surface papers include tea board paper and kraft paper, while the core paper uses corrugated paper. The colors and textures of various papers are different, and the paper (color and texture) produced by different cardboard box manufacturers are also different. The national standard for corrugated cardboard boxes is GB6543-86 "Corrugated cardboard boxes".


1. Carton type

The commonly used types of cardboard boxes currently include: double tower cardboard boxes, A-type cardboard boxes, and top and bottom cover cardboard boxes; Common sealing methods: I-shaped, Wang shaped, Japanese shaped The thickness can be divided into three layers, five layers, and seven layers; The commonly used materials for cardboard boxes are: A=A, A=B, K=K
For the identification of corrugated cardboard boxes:



corrugation type
Leng Gao, mm

Leng number, piece/300mm

A 4.5-5.0

34±2

four point five

C 3.5-4.0

28±2

three point five

B 2.5-3.0

50±2

two point five

E 1.1-2.0

96±4

one point one











What does K=A, A=A, A=B, A3A, B3B, B3C mean for paper?

K paper is the best, followed by A, B, and C
A3A, There are three layers, with A paper on the surface and A paper on the bottom, and another layer in the middle
K=250g A=175g B=150g C=125g slag=112g
A3A: The middle 3 is the height of the pit
C3C stands for three-layer board, with 130g grade box board paper for the surface and inner paper, and 130g ordinary corrugated paper
B=C means five layer board, with a surface paper of 130gA grade kraft paper, an inner paper of 130gC grade boxboard paper, and 3 strips of 130g ordinary corrugated paper
B=C means five layer board, with a surface paper of 130gA grade kraft paper, an inner paper of 130gC grade boxboard paper, and 3 strips of 130g ordinary corrugated paper
# represents seven layer cardboard, 3 represents three layer cardboard, also represented by -,=represents five layer cardboard



a. Ordinary cardboard box paper:
Ordinary cardboard box paper X is: K A B C 3 deteriorates in sequence;
X9X (thickness of 2 mm) represents E pit (young pit) X3X (thickness of 3mm) - represents a single layer
X=X (thickness of 6mm) - represents double-layer X ≡ X (thickness of 9mm) - represents three-layer
X - represents surface paper, pit pattern - ordinary pit paper,
Middle layer flat paper - if there is no indication, it is ordinary paper W - represents white paper,
Single pit (paper) Double pit (paper) Three pit (paper) Young pit (paper)
C33 B=3 B≡B B9B
B33 B=C B≡C B9C
B3C B=B B≡3 A9A
B3B A=B A≡B A9B
A3B A=A A≡A W9A
W3B W=B W≡B W9B
b. Selection of materials for ordinary cardboard boxes:
Generally, B=B is used, and the paper thickness is about 6mm, which is the lowest material If the customer has a request, A=B can also be used. This material has better strength and higher price than B=B, while A=A paper is better than A=B and B=B, with a thickness of 6mm and higher price. Unless there are special requirements, it should be selected.