Medium weight coated (MWC) papers are a popular choice in the paper industry, particularly for high-quality printing. These papers are known for their mechanical pulp composition, with a coat weight ranging from 12 to 25 g/m2/side. They are also referred to as double coated papers, as they can be coated on both sides for added durability and printability.

One of the key advantages of MWC papers is their higher information carrying capacity compared to lightweight coated (LWC) papers. This makes them an ideal choice for applications that require high-quality printing and vibrant colors. They are commonly used in special interest magazines, catalogs, direct mail, and other advertising materials.

MWC papers come in a range of basis weights, typically varying between 70 and 130 g/m2. The most commonly used weights fall within the 70-90 g/m2 range. These papers are known for their high brightness, good opacity and gloss, excellent smoothness, and adequate stiffness. When folded, they do not crack or lose their integrity.

The coated surface of MWC papers is designed to minimize ink absorbency, resulting in reduced dot gain during offset printing. This enhances the definition and clarity of the printed images. The smooth and homogenous surface structure of MWC papers also contributes to good ink gloss, making them a preferred choice for high-power advertisements.

The production process of MWC papers involves a combination of mechanical pulp and chemical pulp. The base paper typically consists of 40% to 55% mechanical pulp and 45% to 60% chemical pulp. The total pigment content in MWC papers can range from 28% to 45%, depending on the desired finish and print quality.

MWC papers are available in both matte and gloss finishes, allowing for versatility in printing applications. The choice between the two finishes depends on the specific requirements of the printed material and the desired aesthetic effect.

It is worth noting that MWC papers are often produced at lower speeds compared to standard LWC papers. This slower production process ensures that the coating is evenly applied and properly bonded to the base paper, resulting in a high-quality end product.

In conclusion, medium weight coated papers offer superior print quality and durability compared to lightweight coated papers. With their high information carrying capacity, excellent smoothness, and good ink gloss, they are a popular choice for high-quality special interest magazines, catalogs, direct mail, and advertising materials. The combination of mechanical and chemical pulp in their production ensures optimal strength and printability. Whether in matte or gloss finish, MWC papers provide a reliable and visually appealing solution for various printing needs.