What is the production process of circular colored copperplate paper?

The production process of circular colored copperplate paper mainly includes the following steps:

1、 Production of copperplate base paper

Pulping:

Raw material selection: High quality wood pulp or other suitable papermaking materials are usually selected.

Chemical pulping: converting raw materials into pulp through processes such as steaming, washing, screening, and bleaching. Steaming and cooking is the most critical process among them.

papermaking:

Beating: Processing pulp using physical and mechanical methods to homogenize its fiber size, increase its surface area, and enhance its strength.

Glue application: Chemical treatment of pulp to make it resistant to fluid (mainly water) infiltration.

Adding fillers: Inorganic fillers (such as talcum powder, kaolin, calcium carbonate, titanium dioxide, etc.) and organic polymer chemicals are added to the slurry to improve the opacity, brightness, smoothness, and other properties of the paper.

Paper making: Wet paper making is used, with water as the medium, to evenly spread the pulp on the paper machine to form paper sheets. The papermaking process plays a crucial role in determining the quality of the paper.

Drying and calendering: The wet paper sheets are dried and then calendered by a calendering machine to improve the smoothness and glossiness of the paper surface.

Quality inspection: Conduct quality inspection on the produced copperplate base paper to ensure that it has uniform thickness, low elasticity, high strength, good water resistance, and no defects such as spots, wrinkles, holes, etc. on the paper surface.

2、 Coating and processing of copperplate paper

Coating preparation: Mix high-quality white pigments, adhesives, and auxiliary additives evenly to prepare coatings with high fluidity and solid content.

Coating: Apply the prepared coating evenly onto the copperplate base paper using a coating machine to form a thin layer of coating.

Drying: Dry the coated paper to firmly adhere the coating to the surface.

Pressing and slitting: Re press the dried paper to improve its glossiness and smoothness. Then, cut and pack as needed.

Circular cutting: Use professional cutting equipment to cut paper into circular shapes to meet specific needs.

3、 Color printing

Design and plate making: Design patterns according to customer needs and produce corresponding printing plates.

Printing: Uniformly print colored ink onto circular copperplate paper using a printing machine. During the printing process, it is necessary to strictly control parameters such as ink viscosity, drying speed, and printing pressure to ensure the quality of the printed product.

Post processing: Performing necessary post-processing on printed materials, such as cutting, laminating, and polishing, to improve their durability and aesthetics.

In summary, the production process of circular colored copperplate paper includes multiple steps such as the production of copperplate base paper, coating and processing of copperplate paper, and color printing. Each stage requires strict control over quality and technical parameters to ensure the quality and performance of the final product.