The thermal paper is impregnated with a solid-state mixture of a dye and a suitable matrix.
Below is a MRR and PLR article in category Computers Technology -> subcategory Hardware.

Summary:
Thermal paper is a type of paper coated with a chemical that changes color when exposed to heat, commonly used in thermal printers. These printers are popular in cost-effective, lightweight devices like adding machines, cash registers, and credit card terminals.
Article Body:
Thermal paper is specially treated with chemicals that allow it to change color upon exposure to heat. It's widely used in thermal printers, which are especially common in economical and portable devices such as adding machines, cash registers, and credit card terminals.
A thermal printer consists of several key components:
1. Thermal Head: Generates heat to print on paper.
2. Platen: A rubber roller that feeds the paper.
3. Spring: Applies pressure to ensure contact between the thermal head and the paper.
4. Controller Boards: Manage the printing mechanism.
To print, thermo-sensitive paper is placed between the thermal head and the platen. The printer sends an electrical current to the thermal head’s heating resistor, generating heat in specific patterns. This heat triggers the color-changing layer of the paper, resulting in a printed image. This process is known as a thermal or direct printing system.
The paper is treated with a solid-state mixture of a dye and a suitable matrix. An example combination includes a fluoran leuco dye and octadecylphosphonic acid. When heated above its melting point, the matrix allows the dye to react with the acid, changing to its colored form. This form is preserved when the matrix quickly solidifies again, a phenomenon known as thermochromism.
Due to rapid printing speeds, modern label printers have evolved with powerful processors and extensive memory to create label images as quickly as they are printed. They use special internal languages to layout labels within the printer’s memory before printing.
Each manufacturer develops its own language, some of which can be quite complex. For instance, to print a barcode, the computer sends codes to the printer specifying the barcode type, size, and placement along with the data. Using predefined algorithms, the printer constructs the barcode, adhering to strict resolution rules to ensure high-quality, readable barcodes. These rules are crucial for maintaining barcode readability across various conditions.
You can find the original non-AI version of this article here: The thermal paper is impregnated with a solid-state mixture of a dye and a suitable matrix..
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