Thermal paper is also called thermistan fax paper, thermal record paper, and thermal copy paper.Thermal paper is a kind of processing paper. Its manufacturing principle is to paint a layer of "thermal coating" (thermist -sensitive color change layer) on high -quality original paper.
What is the use of thermal paper
Heat sensitivity paper: As a communication carrier of text and graphics on the fax machine, as a fax paper; as a record material in medical and metering systems, such as electrocardilateral paper, heat work instrument record paper, etc.;In terms of business activities, it is used to make trademarks, visa (POS), etc. Among them, the proportion of fax paper has the largest proportion.
The production principle of thermal paper is to apply particle powder on ordinary paper base. The ingredients are colorless dye phenol or other acidic substances. They are separated by film. Under heating conditions, the film melts, and the powder mixes the color reaction. Thermal sensitivity.The handwriting on the paper is unstable and easy to disappear, resulting in the difficulty of file content.
The commonly used lottery is thermal paper.
Ordinary thermal paper is not suitable for long -term preservation, but good thermal paper can be stored for 30 years or even longer.
How to identify thermal paper
1. Appearance: If the paper is very white, it means that the protective coating and thermal coating of the paper are unreasonable, adding too much fluorescent powder, and the better paper should be slightly green.The cleanliness of the paper is not high or it looks uneven, indicating that the paper coating is uneven. If the paper looks strong, it also adds too much fluorescent powder, which is not very good.
2. Fire roasting: The method of grilling with fire is also very simple. Use a lighter to heat it on the back of the paper. If heated, the color appeared on the paper is brown, indicating that the thermal formula is not reasonable, and the preservation time may be relatively short.The black part of the paper has small stripes or uneven colors, indicating that the coating is uneven.After heating, good quality should be black and green (with a little green), and the color blocks should be uniform, and the color gradually fades from the center to the surroundings.
3. Comparison of sunshine exposure: Apply the printed paper with a fluorescent pen and place it under the sun (so that the thermal coating can respond to light).short.