What is the basic principle of printing transparent thermal sensitive label paper?

The basic principle of transparent thermal label paper printing is mainly based on thermal printing technology, which is a special chemical reaction process. The following is a detailed explanation of its basic principles:

1、 Structure of Thermal Printing Paper

Transparent thermal sensitive label paper is actually a special type of coated processing paper, which looks similar to ordinary white paper, but has a smooth surface and is covered with a thermosensitive coloring layer. This coloring layer is composed of adhesive, color developer, and colorless dye, and is the key to thermal printing.

2、 Thermal printing process

Heating:

When the print head of the thermal printer comes into contact with transparent thermal label paper, the small electronic heater on the print head will heat a specific position on the paper.

Chemical reaction:

Under the action of heating, the colorless dye on the thermal paper undergoes a chemical reaction with the color developer. This reaction is carried out under certain temperature conditions, and high temperature will accelerate the reaction.

Specifically, when the temperature reaches a certain level (such as 200 ℃), this chemical reaction will quickly complete within a few microseconds, causing the originally colorless dye to change color and form visible images or text.

Image formation:

By controlling the heater on the print head, specific positions of the thermal paper can be selectively heated to form corresponding graphics or text.

At the same time, the logic circuit that controls the heating element is also responsible for controlling the paper feed, ensuring that the entire label or paper can print complete graphics or text.

3、 Characteristics of Thermal Printing

No ink required:

Thermal printing technology does not require the use of consumables such as ink or ribbon, thus reducing the hassle and cost of replacing consumables.

Fast printing speed:

Due to the rapid chemical reaction, thermal printers can achieve high-speed printing.

Easy to operate:

Thermal printers typically have a simple operating interface and a high degree of automation, making the printing process more convenient.

Vulnerable:

It should be noted that images or text on thermal printing paper are easily affected by physical and chemical conditions such as light, temperature, and humidity, and therefore may have certain shelf life limitations.

In summary, the basic principle of printing transparent thermal sensitive label paper is to use thermal printing technology to generate visible images or text by heating colorless dyes and color developing agents under specific temperature conditions.