Physical and Printing Properties
Surface Smoothness: The coated side of one - side coated paper is extremely smooth due to the coating process and subsequent calendering. This smooth surface allows for sharp and detailed printing, making it ideal for high - quality color printing jobs. For example, in the printing of brochures, posters, and product catalogs, the smooth surface ensures that colors are vivid and images are clear.
Ink Absorption: It has excellent ink - absorption characteristics. When ink is applied during the printing process, the coated side can quickly absorb the ink, which helps in setting the color firmly and preventing smudging. This property is crucial for achieving high - resolution prints, whether it is in offset printing, digital printing, or flexographic printing.
Color Reproduction: The white and smooth surface of the coated side enhances color reproduction. It reflects light evenly, making the printed colors appear more vibrant and true - to - life. This is why it is highly favored for applications where visual appeal is of utmost importance, such as in the packaging of consumer goods or in advertising materials.
Sizes and Weights
Sizes: One - side coated paper is available in a variety of standard sizes to meet different printing needs. Common sheet sizes include 787×1092 mm and 880×1230 mm in the Asian market. In the international market, sizes like A4 (210×297 mm), A3 (297×420 mm), and others are also widely used. Roll - fed one - side coated paper comes in different widths, typically ranging from a few centimeters to several meters, which is convenient for high - volume printing on web - fed presses.
Weights: The weight of one - side coated paper is usually measured in grams per square meter (g/m²). Common weights include 100 g/m², 120 g/m², 150 g/m², 180 g/m², 200 g/m², and 250 g/m². Lighter - weight papers, such as 100 - 120 g/m², are often used for applications like flyers and lightweight brochures where cost - effectiveness and portability are important. Heavier - weight papers, like 200 - 250 g/m², are more suitable for items such as high - end product catalogs, luxury packaging, and some types of greeting cards, as they provide a more substantial and durable feel.
Production Process
Base Paper Preparation: First, the base paper is produced from wood pulp. The pulp is processed to remove impurities and is then formed into a continuous sheet on a paper - making machine. The quality of the base paper, including its strength, smoothness, and uniformity, is crucial as it serves as the foundation for the coated paper.
Coating Application: The coating material, which is a mixture of pigments, binders, and additives, is applied to one side of the base paper. This can be done using various methods, such as blade coating, roll coating, or air - knife coating. The coating thickness is carefully controlled to ensure consistent quality.
Drying and Calendering: After the coating is applied, the paper is dried to remove moisture. This is usually done in a drying section of the paper - making machine. Once dried, the paper undergoes calendering, where it is passed through a series of rollers under high pressure. This process further smoothens the coated surface and improves its gloss and printability.
Applications
Printing and Publishing: One - side coated paper is widely used in the printing of brochures, leaflets, magazines, and books. For example, in the publication of fashion magazines, the coated side is used to print high - quality images of models and clothing, while the uncoated side can be used for text, which is easier to read. In textbooks, the coated side may be used for illustrations and photographs, enhancing the visual learning experience.
Advertising and Marketing: It is a popular choice for advertising materials such as posters, flyers, and direct - mail pieces. The excellent print quality on the coated side helps in attracting the attention of consumers. For instance, a brightly - colored poster printed on one - side coated paper can stand out in a crowded advertising environment.
Packaging: In the packaging industry, one - side coated paper is used for product boxes, labels, and inserts. The coated side can display product information and branding in an attractive way, while the uncoated side can be in contact with the product or used for gluing during the packaging process. For example, the labels on high - end cosmetics or food products often use one - side coated paper to convey a sense of quality.
Market and Competition
The global one - side coated paper market is highly competitive. Key manufacturers include Nippon Paper Industries, Oji Holdings, Sappi, Stora Enso, UPM, and many others. These companies are constantly innovating to improve the quality of their products, reduce production costs, and meet the changing demands of the market. For example, some manufacturers are developing more environmentally friendly coating materials to appeal to consumers who are increasingly concerned about sustainability. The market is also influenced by factors such as the growth of the printing and packaging industries, technological advancements in printing methods, and changes in consumer preferences for printed materials.
If you need coated paper or other kinds of paper, please contact us. We have a large stock of various types of paper. We can offer you a quotation for your reference.
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