Is copperplate label sensitive to changes in temperature and humidity?

Copperplate label paper does have a certain sensitivity to changes in temperature and humidity, but this sensitivity may vary depending on the specific type of paper, production process, use environment and other factors. The following is a detailed analysis of the temperature and humidity sensitivity of copper label paper:

First, temperature sensitivity

1.General coated paper label:

Temperature range: The application temperature range of coated paper labels is usually wide, such as -50 ° C to 90 ° C (according to some information). This shows that the coated paper label has good stability at the general ambient temperature.

High temperature impact: Although coated paper labels are relatively little affected by temperature, performance degradation may still occur under extreme high temperature conditions (such as exceeding the upper limit of their application temperature). However, this is relatively rare, as the temperature of most application scenarios is within the applicable range of coated paper labels.

2.Gold and silver card coated paper label:

This kind of label is usually made of coated paper as a substrate, and then compounded with materials such as PET film or aluminum foil. Because metal and plastic materials are very sensitive to temperature changes, gold and silver card coated paper labels have higher temperature requirements. In low temperature environment (such as below 10℃), its suitability may be affected; At extreme low temperatures (such as about 0 ° C), after being transported from the paper bank to the printing workshop, the surface may appear a lot of water vapor due to the temperature difference, affecting normal printing.

Second, humidity sensitivity

Paper fibers are porous and hydrophilic and are very sensitive to water. Therefore, coated paper labels may also show different performance in different humidity environments.

1.The effect of humidity on paper size:

The water content of paper increases with the increase of relative humidity, and the paper size will become larger accordingly (generally the horizontal change is larger). On the contrary, the relative humidity is reduced, the paper water content is reduced, and the paper size will be reduced accordingly. This size change is particularly important for products that require accurate overprinting, as even small size changes can result in inaccurate overprinting.

2.Sensitivity of different coated paper to humidity:

Different types of coated paper may have different sensitivity to humidity. For example, some specially treated coated paper may have better dimensional stability and maintain better performance in environments with large humidity changes.

Third, Control measures

In order to reduce the impact of temperature and humidity changes on the performance of coated paper labels, printing companies can take the following control measures:

1.Control the temperature and humidity of the storage and production environment: Ensure that the paper is in a suitable temperature and humidity environment during storage and production to reduce the risk of size changes and performance degradation.

2.Humidification of the paper: Determine the water content of the paper before it is released from the paper library, and perform humidification treatment as needed to ensure the water content and dimensional stability of the paper.

In summary, copper plate label paper has a certain sensitivity to changes in temperature and humidity, but this sensitivity can be reduced by reasonable storage and production environment control and necessary humidification treatment. Therefore, when using copper plate label paper, it is necessary to choose the appropriate paper type and control measures according to the specific application scenarios and requirements.