What is the material composition of color copperplate label paper?

The material composition of color copperplate label paper mainly includes copperplate base paper and paint. The following is a detailed analysis of the two components:

1. Copper plate base paper

Definition: copperplate base paper is the basic material of copperplate paper, which determines the basic properties of the paper, such as thickness, strength, scalability, etc.

Features: copperplate base paper requires uniform thickness, small scalability, high strength, good water resistance. At the same time, the paper should not have spots, wrinkles, holes and other paper diseases to ensure the quality of coating and printing.

Raw materials: Copperplate base paper is usually made of bleached chemical wood pulp or mixed with partially bleached chemical straw pulp on a paper machine. These raw materials are carefully selected and treated to ensure the quality and stability of the paper.

2. Paint

Definition: Paint is a layer or layers of fine material coated on the surface of copperplate base paper, which gives the copperplate paper a unique appearance and performance.

Composition: The coating is mainly composed of high-quality white pigments (such as kaolin, barium sulfate, etc.), adhesives (such as polyvinyl alcohol, casein, etc.) and auxiliary additives. These ingredients are precisely proportioned and mixed to form a coating with high fluidity and high solids content.

Function: The coating not only improves the whiteness and gloss of the coated paper, but also enhances its printability and wear resistance. Through the uniform brushing and drying treatment of the coating machine, the coating is firmly attached to the surface of the copper plate base paper, forming a smooth and delicate coating.

3. Other ingredients

Adhesive: In the manufacturing process of colored copperplate label paper, adhesive is also used to fix the label paper and the backing paper. These adhesives need to have good viscosity and stability to ensure that the label paper is not easy to fall off during use.

Base paper: Base paper is usually release paper, its surface is non-adhesive with low surface energy, and has an isolating effect on the adhesive. The role of the backing paper is to protect the label paper from damage during the printing and die-cutting processes, and to facilitate the stripping and use of the label paper.

4. Summary

The material composition of color copperplate label paper mainly includes copperplate base paper and paint. Copperplate base paper provides the basic properties of the paper, while the coating gives the copperplate paper its unique appearance and properties. In addition, auxiliary materials such as adhesives and backing paper also play an important role in the manufacturing process of label paper. These ingredients are carefully selected and proportioned to form high-quality, high-performance color copperplate label paper.