Use of thermal paper
Thermal paper: as a communication carrier for text and graphics on a fax machine, that is, as a fax paper; as a recording material in medical and measurement systems, such as electrocardiogram drawings, thermal instrument recording paper, etc.; printing paper applied to Internet terminals; In terms of business activities, it is used to make trademarks, signs (POS), etc., of which the proportion of fax paper is the largest.
The principle of thermal paper is to apply fine powder on ordinary paper base. The composition is leuco dye phenol or other acidic substances. The film is separated by film. Under the heated condition, the film melts and the powder mixes to develop color reaction. The color writing on the paper is unstable and easy to fade, which makes the contents of the file difficult to identify. The commonly used lottery tickets use thermal paper.
Ordinary thermal paper is not suitable for long-term storage, but good thermal paper can be stored for 30 years or even longer.
Quality identification of thermal paper
1. Appearance: If the paper is very white, it means that the protective coating and heat-sensitive coating of the paper are unreasonable, and too much phosphor is added. The better paper should be slightly greenish. The paper finish is not high or looks uneven, indicating that the paper coating is uneven. If the paper looks very reflective, it adds too much phosphor and the quality is not good.
2, fire roast: the method of roasting with fire is also very simple, use a lighter to heat the back of the paper, if heated, the color on the paper is brown, indicating that the thermal formula is not reasonable, the storage time may be shorter, if The black part of the paper has small streaks or uneven color patches, indicating uneven coating. Paper of better quality should be black-green (with a little green) after heating, and the color blocks are even, and the color gradually fades from the center to the periphery.
3, sunlight exposure contrast identification: the printed paper is painted with a highlighter and placed in the sun under the sun (this can accelerate the thermal coating response to light), which paper is the fastest black, indicating the more time can be saved short.
Thermal paper: as a communication carrier for text and graphics on a fax machine, that is, as a fax paper; as a recording material in medical and measurement systems, such as electrocardiogram drawings, thermal instrument recording paper, etc.; printing paper applied to Internet terminals; In terms of business activities, it is used to make trademarks, signs (POS), etc., of which the proportion of fax paper is the largest.
The principle of thermal paper is to apply fine powder on ordinary paper base. The composition is leuco dye phenol or other acidic substances. The film is separated by film. Under the heated condition, the film melts and the powder mixes to develop color reaction. The color writing on the paper is unstable and easy to fade, which makes the contents of the file difficult to identify. The commonly used lottery tickets use thermal paper.
Ordinary thermal paper is not suitable for long-term storage, but good thermal paper can be stored for 30 years or even longer.
Quality identification of thermal paper
1. Appearance: If the paper is very white, it means that the protective coating and heat-sensitive coating of the paper are unreasonable, and too much phosphor is added. The better paper should be slightly greenish. The paper finish is not high or looks uneven, indicating that the paper coating is uneven. If the paper looks very reflective, it adds too much phosphor and the quality is not good.
2, fire roast: the method of roasting with fire is also very simple, use a lighter to heat the back of the paper, if heated, the color on the paper is brown, indicating that the thermal formula is not reasonable, the storage time may be shorter, if The black part of the paper has small streaks or uneven color patches, indicating uneven coating. Paper of better quality should be black-green (with a little green) after heating, and the color blocks are even, and the color gradually fades from the center to the periphery.
3, sunlight exposure contrast identification: the printed paper is painted with a highlighter and placed in the sun under the sun (this can accelerate the thermal coating response to light), which paper is the fastest black, indicating the more time can be saved short.
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