How to dry the color thermal label paper after printing?

Drying the color thermal label paper after printing is an important step to ensure the quality and performance of the label paper. The following are some common drying methods and precautions:

First, drying treatment method

1. Natural air drying

Place the printed color heat-sensitive label paper flat in a ventilated and dry place and wait for it to dry naturally. Although this method is simple and easy, it takes a long time, and the drying effect is greatly affected by the ambient humidity and temperature.

2. Temperature controlled drying equipment

Use a temperature-controlled drying device, such as a drying box, to dry the labels. This method can precisely control the drying temperature and time, so as to obtain a better drying effect. Generally speaking, the drying temperature is controlled between 70 ° C and 100 ° C to avoid excessive temperature resulting in advance color or damage to thermal paper.

3. Hot air drying

Use a hot air drying device to dry the label paper. This method accelerates the evaporation of water on the surface of the label paper by blowing hot air, thereby increasing the drying speed. However, it is also necessary to control the temperature and time to avoid damage to the label paper.

4. UV curing

For label paper printed with UV ink, it can be dried using UV curing equipment. UV curing has the characteristics of fast curing and low temperature curing, which helps to improve product quality and drying efficiency. However, it is necessary to pay attention to the power and irradiation time of the UV lamp to ensure that the ink is thoroughly dry.

Second, drying treatment precautions

1. Control temperature and time

No matter which drying method is used, the temperature and time need to be strictly controlled. High temperature or too long time may cause damage to the label. If the temperature is too low or the time is too short, the drying may not be complete.

2. Avoid pollution

During the drying process, avoid contaminating the labels with contaminants such as dust and grease. A clean cloth or paper can be used to cover the surface of the label paper to reduce the risk of contamination.

3. Check drying effect

After drying, check the drying effect of the label. You can determine whether the label is completely dry by touching, observing, or using an instrument to detect it. If it is found that the drying is not thorough, it needs to be dried again.

4. Keep in safe

After drying, the color heat-sensitive label paper should be stored in a dry, ventilated, and light-free environment to avoid deterioration of the paper due to moisture, heat or light exposure. At the same time, pay attention to the batch and shelf life of the paper, and avoid using expired paper.

In summary, when drying the printed color thermal label paper, you need to choose the appropriate drying method and pay attention to related matters according to the actual situation to ensure the quality and performance of the label paper.