How to distinguish the quality of color thermal label paper?

The quality of color thermal label paper can be distinguished from the following aspects:

First, appearance inspection

1.Color and gloss: The color of high-quality color thermal label paper should be uniform, bright, slightly green, and the surface has a certain gloss. If the paper is too white or reflects light strongly, it may be that too much phosphor has been added, and the quality may be poor.

2.Flatness and uniformity: The paper should be flat and smooth, without obvious uneven phenomenon. At the same time, the heat-sensitive coating should be evenly distributed to ensure the stability and consistency of the printing effect.

Second, physical test

1.Fire test: Heat the back of the paper with a lighter and observe the color change of the paper. If the paper appears black and green after heating and the color block is uniform, the color gradually lightened from the center to the four sides, indicating that the heat-sensitive formula is reasonable and the quality is good. If the paper appears brown or black parts have stripes, color spots, it may be unreasonable heat sensitive formula or uneven coating, poor quality.

2.Sun exposure comparison: the printed paper is daubed with a highlighter and placed in the sun to accelerate the reaction of the heat-sensitive coating to light. Observe the speed of the paper blackening, the shorter the preservation time of the first blackened paper, indicating that the quality is relatively poor.

3.Friction test: Use a standard eraser or cloth to repeatedly wipe the printed thermal paper to observe whether the handwriting is easy to fall off or blur. High-quality thermal paper should have good friction resistance to ensure that it is not easy to damage or blur information in normal use.

Third, the printing effect

1.Clarity and color fullness: The actual print test is carried out by the printer to observe the print effect. High quality thermal label paper should be able to clearly and quickly present the printed content, the edge of the text or image smooth, no blur or broken line phenomenon. At the same time, the color after printing should be uniform, no obvious color difference or spots.

2.Ink absorption: Pay attention to whether the paper can absorb ink. If the paper does not have good ink absorption, it may have an adverse effect on the printing quality.

Fourth, durability evaluation

1.Light resistance: high-quality heat-sensitive label paper should have good light resistance and be able to hold color in the sun for a long time. On the contrary, poor quality thermal label paper is easy to fade in the sun, affecting the service life of the label.

2.Heat resistance: Test the deformation and decolorization of paper under high temperature environment. High-quality heat-sensitive label paper should be able to maintain no deformation and no decolorization in a high temperature environment for a long time.

3.Water resistance: Test paper deformation and decolorization in wet environment. High-quality heat-sensitive label paper should be able to maintain no deformation and no decolorization in a humid environment for a long time.

Fifth, other factors

1.Adhesion: high-quality heat-sensitive label paper should be firmly attached to the surface of the object to be attached, not easy to fall off.

2.Brand and certification: Choosing products from well-known brands is usually more secure, because these brands often have more stringent quality control systems and after-sales service guarantees. At the same time, pay attention to whether the product has passed the relevant quality certification, such as ISO, CE, etc., these certifications mark that the product meets certain quality standards and safety requirements.

To sum up, identifying the quality of color thermal label paper requires comprehensive consideration of appearance, physical testing, printing effect, durability and other factors. By comprehensively evaluating these aspects, you can choose high-quality color thermal label paper products.