What is the working principle of small roll thermal label paper?

The working principle of small roll thermal label paper is mainly based on thermal printing technology, and its detailed explanation is as follows:

1、 Overview of Working Principle

The working principle of small roll thermal label paper is to heat the thermal coating on the surface of the paper through a thermal print head, thereby triggering a chemical reaction, causing the coating to change color and display the desired text or image.

2、 Specific working principle

Thermal sensitive coating:

The surface of the small roll thermal label paper is coated with a special thermal sensitive coating, which is composed of a latent dye (colorless dye) and a color developer (acidic substance).

At room temperature, these dyes and colorants are in a stable state and will not develop color.

Thermal print head:

The thermal print head contains many tiny semiconductor heating elements inside.

When these heating elements are activated, they generate heat and transfer it to the surface of the print head in contact with the thermal paper.

Heating and color development:

When the heating element of the thermal print head comes into contact with the coating of the thermal paper, the latent dye and color developer in the coating undergo a chemical reaction under the action of heat.

This chemical reaction causes a change in the molecular structure of the dye, resulting in the appearance of color.

The selective heating of the heating element causes specific areas on the thermal paper to appear colored, forming the desired text or image.

Printing process:

During the printing process, the thermal paper is transported forward by the drum and comes into contact with the print head.

The print head controls the heating of the heating element based on the print data, thereby forming continuous images or text on the thermal paper.

3、 Application and Precautions

Application:

Small roll thermal label paper is widely used in logistics, inventory management, retail and other fields due to its fast and efficient printing characteristics.

It is commonly used for printing price tags, barcodes, product information labels, etc.

matters needing attention:

The shelf life of thermal paper is limited, and prolonged exposure to light, high temperatures, or humid environments may lead to a decrease in printing quality.

When using and storing small rolls of thermal label paper, it is important to avoid these adverse conditions.

Choose the appropriate thermal printer and thermal paper to ensure printing quality and efficiency.

In summary, the working principle of small roll thermal label paper is to heat the thermal coating on the surface of the paper through a thermal print head, thereby triggering a chemical reaction and color development. This printing method has advantages such as speed, efficiency, and environmental friendliness, and is widely used in multiple industries.