What are the main components of colored copperplate label paper?

Color copperplate label paper, also known as copperplate label, its main components include pulp, filler, white pigment and paint, of which paint is a particularly important component. Here is a detailed breakdown of these key components:

1.Paper pulp

Basic material: Pulp is the basic material of color copperplate label paper, which provides the basic structure and strength of the paper.

Source: Pulp is usually made from wood or other plant fibers by chemical or mechanical processes.

2.Stuffing

Function: Fillers are used to enhance the smoothness, whiteness and opacity of the paper, while also helping to control the cost of the paper.

Common types: Common fillers include kaolin, calcium carbonate and so on.

3. White pigment

Function: White pigment is used to enhance the whiteness of paper, making it brighter and more pure, which is conducive to subsequent printing and visual effects.

4.Paint

Core components: Paint is one of the most critical components of color copperplate label paper, which determines the gloss, smoothness and printability of the paper surface.

Composition: The paint is mainly composed of high-quality white pigments (such as kaolin, barium sulfate, etc.), adhesives (such as polyvinyl alcohol, casein, etc.) and auxiliary additives.

Function: The coating can form a smooth, delicate and hard coating on the surface of the paper, which not only improves the printing quality of the paper, but also enhances the degree of color reduction and visual effect.

Processing process

The production process of colored copper plate label paper usually includes the following steps:

1.Base paper preparation: Select the copper plate base paper that meets the requirements to ensure its uniform thickness, small scalability, high strength and good water resistance.

2.Coating: The coating with large fluidity and high solid content is evenly coated on the base paper through the coating machine.

3.Drying treatment: The coated paper is dried to remove moisture and solvents from the paint.

4.Super calender: The super calender is finished on the super calender to make the surface of the paper smoother and brighter.

5.Slitting and packaging: Finally, the paper is slitted and packaged after pressing, and the finished color copper plate label paper is obtained.

To sum up, the main components of color copperplate label paper include pulp, fillers, white pigment and paint, etc., of which paint plays a vital role in improving the surface quality of paper and printing effect.