What are the product quality standards for transparent thermal label paper in the market?

The product quality standards for the transparent thermal label paper market mainly cover the following aspects:

1、 Basic physical properties

Thickness: The thickness of transparent thermal label paper is usually within a certain range, with a common thickness range of 55-80 microns, to meet the needs of different application scenarios.

Tightness: The tightness of paper affects its mechanical properties and printing effect, and needs to be controlled within a certain range to ensure printing quality and durability.

Smoothness: Smoothness is an important indicator for detecting the smoothness of the colored surface of thermal paper. Smoothness not only affects the quality of thermal imaging, but also the lifespan of the print head. Rough paper can damage the print head during contact and shorten its usage time. For transparent thermal label paper, higher smoothness is required to ensure that the printed images and text are clear and without blurring.

2、 Printing performance

Hair color performance: including static hair color performance and dynamic hair color performance. Static color performance refers to the color rendering effect of paper when heated in a static state, while dynamic color performance refers to the color rendering effect of paper when heated during the printing process. Both need to meet certain standards to ensure that the printed images and text are clear and brightly colored.

Printing density: Printing density refers to the density of printed text and images, which must meet certain standard requirements to ensure clear and visible printing effects.

Image preservation performance: Transparent thermal label paper needs to have certain image preservation performance to ensure that the printed images and text are not easily faded or blurred during long-term use. This mainly depends on the quality and stability of the thermal sensitive coating.

3、 Chemical properties

Bisphenol A content: According to the GB/T 28210-2024 "Thermal Paper" standard issued by the State Administration for Market Regulation and the National Standardization Administration, the bisphenol A content of ordinary thermal paper should be less than 200mg/kg; The content of bisphenol A in special thermal paper (type I) should also be less than 200mg/kg; The content of bisphenol A in special thermal paper (type II) should not be detected. This standard aims to ensure the health and safety of consumers.

Waterproof, oil draining, ethanol resistant, and friction resistant properties: For transparent thermal sensitive label paper, especially those used in logistics, supermarkets, and other fields, it is necessary to have certain waterproof, oil draining, ethanol resistant, and friction resistant properties to ensure that the label can remain clear and readable in harsh environments such as moisture, grease, or friction.

4、 Environmental performance

Degradability: With the increasing awareness of environmental protection, more and more customers are paying attention to the environmental performance of transparent thermal label paper. Choose biodegradable or recyclable label paper materials to reduce environmental pollution.

Non toxic and harmless: The production and use of transparent thermal label paper should ensure that it is non-toxic and harmless, and does not cause harm to human health and the environment.

5、 Other performance

Thermal stability: Transparent thermal sensitive label paper should not deform or deteriorate easily in high temperature environments to ensure the stability and consistency of printing effects.

Light stability: Under prolonged exposure to sunlight, transparent thermal sensitive label paper should not easily discolor or fade to maintain the clarity and readability of the label.

Aging resistance: in long-term use, transparent thermal label paper should not be prone to yellowing or embrittlement, so as to extend its service life.

In summary, the product quality standards of the transparent thermal label paper market cover multiple aspects such as basic physical properties, printing performance, chemical properties, environmental performance, and other properties. These standards aim to ensure the quality stability and reliability of transparent thermal label paper, meeting the needs of different industries and customers.