Copper plate label paper long-term storage will turn yellow?

Long-term storage of copper label paper may turn yellow, which mainly depends on the storage conditions and the characteristics of the paper itself. Here's a closer look at the problem:

First, the impact of storage conditions

1.Humidity: Humidity is an important factor affecting paper discoloration. If the storage environment humidity is too high, coated paper is easy to absorb moisture in the air, which may not only lead to paper deformation, but also may accelerate the oxidation process of the paper, resulting in yellowing.

2.Light: Exposed to sunlight for a long time, coated paper may undergo photochemical reactions due to ultraviolet light, resulting in color fading or yellowing. Therefore, it should be stored away from direct sunlight.

3.Temperature: Although coated paper is relatively difficult to oxidize, extreme temperature changes can still have adverse effects on the paper. At high temperatures, certain components in the paper may accelerate aging, which in turn causes yellowing.

4.Air: The contact time between the paper and the air is too long, and the oxygen and other gases in the air may react with some components in the paper, causing the paper to turn yellow.

Second, the impact of the characteristics of the paper itself

1.Coating strength: The surface of coated paper is coated with a layer of white paint, and the strength and stability of the coating have a certain influence on the discoloration performance of the paper. If the coating quality is poor or the coating is aged, it may cause the paper to turn yellow easily.

2.Raw material composition: The main raw materials of coated paper are copperplate base paper and paint. If the raw material contains ingredients that are easy to change color, or certain additives in the paint react after a long time of storage, it may also cause the paper to turn yellow.

Third, Measures to prevent yellowing

1.Control the storage environment: Ensure that the storage environment is dry and well-ventilated, avoid humidity and high temperature. A moisture box or desiccant can be used to keep the environment dry. At the same time, avoid direct sunlight and store the paper in a dark place.

2.Reasonable packaging: For copper plate label paper that needs to be stored for a long time, appropriate packaging materials can be used for sealed packaging to reduce the contact between paper and air and light.

3.Regular inspection: Check the stored copper plate label paper regularly to find and deal with any factors that may cause yellow in time.

In summary, long-term storage of copper label paper has the risk of yellowing, but by controlling the storage environment and taking appropriate preventive measures, this risk can be effectively reduced. It should be noted that different brands and different quality of copper plate label paper may have differences in discoloration performance, so in practical applications, the appropriate paper and storage method should be selected according to the specific situation.