வெப்ப ஒட்டும் காகிதம் மறைவதற்கு எவ்வளவு நேரம் ஆகும்?
With the increasing demand for thermal self-adhesive paper in the market, the storage time of many thermal labels, tickets and cashier receipts has become a question for many consumers. Thermal self-adhesive paper is also called thermal label paper. When printing with thermal self-adhesive paper, there is no need to use ribbon supporting facilities, which saves the cost of printing consumables. So how long do we know that thermal self-adhesive paper will disappear?
Let's talk about why thermal self-adhesive paper disappears after printing?
Because thermal self-adhesive paper is made of thermal paper, the main raw material is thermal paper. The principle of thermal paper is to coat a fine powder on an ordinary paper base, which is composed of leuco dye phenol or other acidic substances separated by a film. Under heating, the film melts and the powders mix to form a color reaction. Therefore, in the same way, thermal self-adhesive paper cannot be stored for too long.
So, how long does thermal self-adhesive paper take to disappear?
If it is to be stored for a long time, it is directly related to the quality of the thermal self-adhesive paper. If the coating of thermal paper is not uniform, some places will be dark and some places will be bright, which will directly affect the printing quality. If the chemical formula of thermal coating is unreasonable, the storage time of thermal self-adhesive paper will be very short. A good thermal self-adhesive paper can be kept for 5 years (at room temperature and out of direct sunlight), or even 10 years.
Therefore, while understanding the knowledge of this article, we also need to know how to distinguish the quality of thermal self-adhesive paper.
1. The handwriting printed on the thermal self-adhesive paper is clear enough, it can be stored for 10 years without fading, and it does not contain toxic substances such as bisphenol A. There is a self-adhesive sticker on the back of the paper. The tape can be replaced when it is used up.
2. The pigments or dyes in the ink can absorb some or even all of the visible light of the color, so that when the ink is applied to the surface of the paper, the surface of the white paper will be colored. The printers we use at home or in the office are mainly inkjet printers and laser printers. Inkjet printers eject tiny droplets of ink onto paper, while laser printers use electrostatic attraction to attract toner to a photosensitive drum, which transfers it to the paper. However, the printing of shopping receipts does not do this. It uses a special thermal paper. About shopping receipts: Compared with ordinary paper, thermal paper has a thin coating on the surface, which contains some special chemicals called leuco dyes.