How to identify the quality of thermal label paper?

Identifying the quality of thermal label paper can be considered from the following aspects:

First,Appearance observation

Color and finish:

The color of high-quality heat-sensitive label paper should be slightly green, not too white. If the paper color is too white, too much phosphor may be added, which will affect its storage time and printing effect.

Observe the finish and evenness of the paper, a good paper should look uniform and have a high surface finish. If the surface is not uniform, it indicates that the thermal sensitive layer and protective layer are not good enough during production, and the paper quality may be poor.

Second, fire test

Color change after heating:

Use a lighter or similar tool to heat the back of the paper and watch the color change. If the paper turns brown after heating, there may be a problem with the heat-sensitive formula and the storage time may be shorter.

High-quality thermal paper should appear black green (with a little green) after heating, and the color block is uniform, and the color gradually fades from the center to the four sides. If the black part of the paper has small stripes or uneven color blocks, it indicates that the coating is not uniform and the quality may be poor.

Third,Comparison and identification of sunlight exposure

Accelerated light response test:

The printed paper is applied with a highlighter and placed in the sun to speed up the reaction of the heat-sensitive coating to light. Observe which paper blackens the fastest. The faster it blackens, the shorter the time it can be stored.

Fourth,Other indicators

Although the following indicators are not directly used to identify the quality of thermal label paper, understanding these indicators can help to evaluate the performance of thermal paper more comprehensively:

1.Paper strength and weight: The strength of the paper determines its durability, while weight is related to the thickness and cost of the paper.

2.The thickness and uniformity of the paper: the paper with a uniform thickness can better absorb heat when printing and ensure the printing effect.

3.Paper smoothness and smoothness: Paper with high smoothness and smoothness can reduce print head wear and improve print quality.

4.Print quality indicators: including printing clarity, printing density, image quality and heat resistance. These indicators directly affect the printing effect and storage time of thermal label paper.

In summary, the identification of the quality of thermal label paper needs to consider the appearance, fire test, sunlight exposure comparison and identification. At the same time, understanding other indicators and application scenarios of paper is also an important factor in choosing high-quality thermal label paper.