Release Paper: Unique Application in Offset and Coated Paper Printing

In the field of printing, Release Paper, as a paper with special functions, plays an irreplaceable role in various printing methods due to its unique physical and chemical properties. Especially in offset and coated paper printing, release paper has shown its excellent application value.

Overview of Offset Printing Technology
Offset printing, also known as lithography, is a widely used printing method. Its basic principle is to use the principle of water and oil immiscibility to form image and text areas and blank areas on the printing plate, and print the image and text on the substrate through the transfer of ink. Offset printing has the advantages of fast printing speed, stable quality and short cycle, and is particularly suitable for large-scale printed products such as books, newspapers, picture albums, posters, etc.

In the offset printing process, the rubber blanket plays a vital role. It can not only make up for the unevenness of the substrate surface, but also fully transfer the ink to ensure the quality of the printed product. In addition, offset printing can also achieve multi-color overprinting, making the printed product rich in color and distinct in layers.

Characteristics and Application of Coated Paper
Coated paper, also known as coated printing paper, is a high-grade paper that has been coated and decorated. Its surface is smooth, delicate, high gloss, and has good ink absorption and inking properties. Coated paper is widely used in printed materials such as covers, illustrations, color pictures, advertisements, packaging, trademarks, etc. of high-grade books and periodicals due to its excellent printing effect.

The production process of coated paper is complicated. It needs to coat a layer of white coating on the surface of the base paper and undergo super calendering. This special production process enables coated paper to present delicate colors and rich layers during the printing process. At the same time, coated paper also has good stiffness and folding resistance, which can meet the production needs of various printed products.

Application of Release Paper in Offset Printing
In the offset printing process, Release Paper (release paper) is mainly used as adhesive paper with good compressive strength and tear resistance. It can effectively prevent ink and glue from adhering to the printing plate or roller during the printing process, ensuring the cleanliness and integrity of the printed product.

Thermal transfer: During the thermal transfer process, Release Paper can be used as a carrier to transfer heat-sensitive ink or thermal transfer film to the substrate. Since release paper has good separation properties, it can be easily peeled off from the substrate after heating, leaving clear images and text.
Label printing: In label printing, Release Paper can be used as the backing paper of the label to protect the label from contamination and damage during storage and transportation. At the same time, the air permeability and wear resistance of release paper can also improve the durability and service life of the label.
Flexographic printing: Flexographic printing is a printing method suitable for various curved surfaces and irregular objects. Release Paper can be used as a carrier for flexible printing plates to ensure that the printing plates remain stable and accurate during the printing process. At the same time, the compressive strength and tear resistance of release paper can also improve the durability and reliability of flexible printing.
Application of Release Paper in Coated Paper Printing
Release Paper also plays an important role in coated paper printing. Since coated paper has a smooth surface, high gloss, and strong adsorption capacity for ink, release paper is needed during the printing process to prevent ink adhesion and contamination.

Protect printed products: During the printing process, Release Paper can serve as a protective layer for printed products to prevent ink from sticking together during the drying process. At the same time, the air permeability and wear resistance of release paper can also improve the durability and service life of printed products.
Improve printing quality: The separation performance of Release Paper can ensure that no residue is left when the printed product is peeled off, thereby improving the cleanliness and integrity of the printed product. This is especially important for printed products that require high precision and high clarity.
Achieve special effects: In coated paper printing, Release Paper can also be used to achieve some special effects, such as hot stamping, hot silver, etc. With the help of release paper, metal foil or pigment can be transferred to the substrate to form a unique visual effect.