How to achieve multi-color display on colored thermosensitive synthetic paper?

The process of achieving multi-color display on colored thermal sensitive synthetic paper mainly relies on its special coating and thermal printing technology. The following are the principles and methods for achieving multi-color display on colored thermal sensitive synthetic paper:

1、 Principle

A special latent dye is used inside the colored thermosensitive synthetic paper. This dye itself is colorless, and at room temperature, thermal paper looks no different from ordinary paper. Once the temperature rises, the dark dye and acidic substance melt into a liquid one after another. At this point, the freely moving molecules meet and immediately react, causing the white paper to display color.

2、 Methods

Multi layer thermal coating:

Dual color thermal paper: By applying two thermal layers, it can produce two colors after thermal development. Usually configured with a low melting point thermal layer on the upper layer and a high melting point thermal layer on the lower layer. When heated, the upper layer develops first, producing a color; When the temperature continues to rise to a certain temperature, the high melting point sensible layer below melts, producing a second color. At this point, the thermal paper exhibits a mixed color of the two thermal layers.

Multi color thermal paper: The principle is similar to two-color thermal paper, but with more coatings, it can achieve display of more colors. By precisely controlling the heating temperature and time, different colors can be generated on thermal paper.

Advanced coating technology: Advanced coating technology can improve the clarity of images and the saturation of colors, making printed images more realistic and rich.

Thermal printing technology: using a thermal head to locally heat thermal paper, triggering chemical reactions in the coating to generate images. The tiny heating elements on the thermal head can precisely control the heating area, temperature, and time, thereby generating delicate and colorful images on thermal paper.

3、 Implementation steps

Image data conversion: Based on the color information of the image, convert the image data into corresponding thermal printing instructions.

Thermal head heating: The thermal head applies heat at different temperatures and times to different positions on the thermal paper according to the thermal printing instructions.

Chemical reaction coloration: The coating on thermal paper produces different chemical reactions at different positions, thereby generating color images.

In summary, colored thermosensitive synthetic paper achieves multi-color display effects through multi-layer thermosensitive coatings, advanced coating technology, and precise control of thermosensitive printing technology. This technology not only improves the clarity of images and color saturation, but also makes the printing process faster and more efficient.