Why does the bar code gradually disappear and only white background remains?

December 19, 2024

Because the bar code should be used in ordinary thermal paper, the image will indeed disappear after long-term placement.

Thermal paper is the United States 3M company first developed, is a kind of heat hair color information paper. Because of its supporting printing facilities are simple, single consumables, no ink, no smoke and odor during recording, thermal paper has been widely used in life, common use scenarios include: cash register, that is, POS machines, ATMs, etc.; Labels, i.e. food labels, luggage labels, etc.; Tickets, namely taxi tickets, movies, train tickets, etc.; Other categories, that is, ECG drawings, B ultra-thermal drawings, etc.

In principle, thermal paper can be divided into physical and chemical types. Physical thermal paper is the use of heat to make the colored pigment physical color to achieve the recording effect. Chemical thermal paper A kind of thermal paper that uses the action of heat to make the components in the thermal layer react chemically and produce color. Chemical thermal paper can also be further subdivided into separate hair color type, metal compound hair color type and colorless dye hair color type, of which colorless dye hair color type is currently the most important class of thermal paper products on the market.

From the point of view of functional characteristics, thermal paper can be divided into ordinary thermal paper and protective thermal paper. Ordinary thermal paper is simple in structure, mostly two-component colorless dye hair color type thermal paper, this thermal paper hair color reaction is reversible, after a long time or exposure to light, high temperature and humidity environment or contact with water, organic solvents will appear image fading or even disappear, so the storage period is short, is the most commonly used in daily life of a thermal paper. Protective thermal paper strengthens one or more of the properties of thermal paper such as light resistance, water resistance, solvent resistance, plasticizer resistance, and scratch resistance on the basis of ordinary thermal paper, and is mostly used in high-end markets such as medical treatment and food labeling.

Author:

Ms. Nicole Zhang

E-mail:

jhtm@gzjh.com.cn

Phone/WhatsApp:

+86 15920151471

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Guangzhou Jiuheng Barcode Co., Ltd. is a national technology enterprise with core competitiveness in variable barcode production, data processing, RFID, and drug regulatory code printing. It integrates variable barcode printing, color printing, table printing, anti-counterfeiting printing, bill processing, sticker printing, barcode consumables and equipment sales. The company was established in 2002 with a registered capital of 40 million yuan and more than 1000 employees. The company is headquartered in Panyu, Guangzhou, with a factory area of 30000 square meters and a construction area of over 50000 square meters. The company has subsidiaries including Guangzhou Jiuheng New Energy Co., Ltd., Guangzhou Hengjinbao Network Technology Co., Ltd., Shanghai Jiuheng Digital Technology Co., Ltd., Tianjin Hengjin Packaging Materials Co., Ltd., Hong Kong Jiuheng Digital Technology Co., Ltd., and Jianghua Jiuheng Digital Technology Co., Ltd. The company's annual sales revenue exceeds 1 billion yuan and is a leading enterprise in the domestic variable barcode printing industry. The company has successively passed ISO9001 quality management system certification and ISO14001 environmental...

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