How does the thermal coating of color thermal label paper work?

The thermal coating of color thermal label paper works based on physical and chemical reactions. The following is the detailed working process:

Heat-sensitive coating composition

The thermal coating of color thermal label paper is mainly composed of colorless dyes (dark dyes), color developing agents and other auxiliary components. These ingredients are stable at room temperature and do not spontaneously produce color.

Working principle

1.Heat-triggered reaction: When the thermal label paper passes through the thermal printer, there are many tiny semiconductor components on the surface of the print head that heat specific areas of the paper. This heating process causes the colorless dye and color developer in the thermal coating to melt and become active.

2.Chemical reaction color development: Under the action of heating, colorless dyes and color development agents meet and chemically react to produce compounds with color. These compounds quickly spread and become fixed on the paper, forming visible graphic information.

3.Cooling curing: With the loss of heat, the resulting color compounds gradually cool and cure on the paper, forming a long-lasting and clear printing effect.

Performance characteristics

High sensitivity: Color thermal label paper is very sensitive to temperature changes and can respond in a short time and produce clear printing results.

Diversified colors: By adjusting the types and proportions of dyes and color developers in the thermal coating, a variety of color printing effects can be achieved to meet the needs of different application scenarios.

Environmental protection and energy saving: Color thermal label paper does not need to use printing supplies such as ink or carbon tape, reducing printing costs and reducing environmental pollution. At the same time, the thermal printing process has low energy consumption, which is in line with the development trend of energy saving and emission reduction.

Application scenario

Color thermal label paper is widely used in logistics and transportation, retail industry, medical industry and other fields. They can be used to print logistics labels, commodity price tags, medical information labels, etc., providing efficient and convenient identification solutions.

In short, the thermal coating of color thermal label paper achieves the color development process by heating to trigger the chemical reaction, which has the characteristics of high sensitivity, diversified color, environmental protection and energy saving, and plays an important role in many fields.