How to identify the quality of three heat-sensitive label paper?

Identifying the quality of the three heat-sensitive label paper can be considered from the following aspects:

First, appearance inspection

1.Color and gloss: Observe the color of the paper, a good heat-sensitive label paper should be slightly green, not too white. If the paper is very white, it may be that too much phosphor has been added, which usually means that the protective coating and thermal coating formulation of the paper is unreasonable, which may affect its preservation time and print quality. At the same time, the paper should have a good gloss and flatness.

2.Coating uniformity: Check the finish and uniformity of the paper surface. If the surface of the paper looks uneven, or there is a significant reflected light enhancement phenomenon, this may be due to the uneven coating. Uneven coating will affect the printing effect, so that the printed text or pattern appears different shades.

Second, physical test

1.Fire test: Briefly heat the back of the paper with a lighter. Observe the color change of the paper after heating. If the color on the paper is brown, there may be a problem with the heat-sensitive formula and the storage time may be shorter. If the black part of the paper has small stripes or uneven color blocks, it also indicates that the coating is uneven. The better quality paper should be 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.

2.Scratch test: Run your fingernail quickly and vigorously across the paper. Real three heat sensitive paper due to the thick coating, scratches should not be obvious. If a deep black scratch is left, it may be a single heat-proof paper or poor coating quality.

Third, functional testing

1.Waterproof test: Put the printed three heat-resistant label paper into water to soak for a period of time (such as at least one hour), and then take out and observe. If the paper has no effect at all, the handwriting does not change, indicating that its waterproof performance is good. On the contrary, it means that the waterproof performance is poor.

2.Oil proof test: Drop a small amount of oil on the label paper to observe whether the oil is absorbed by the paper and whether the writing is affected. High quality three heat sensitive label paper should be able to effectively resist the erosion of grease.

3.Friction test: Rub hard objects on the label paper to observe whether the writing is easy to fade or blur. The heat-resistant label paper with good friction resistance should be able to keep the handwriting clear.

Fourth, other considerations

1.Storage time: Determine the storage time of the label based on actual requirements. In general, high-quality heat-resistant label paper can be stored for a long time without fading or deterioration.

2.Environmental protection: Choose three heat-resistant label paper made of environmentally friendly materials, in line with the concept of sustainable development.

In summary, the identification of the quality of the three heat-sensitive labels needs to be comprehensively considered from many aspects. Through the comprehensive analysis of appearance inspection, physical testing, functional testing, and other considerations, the quality of the label can be more accurately judged.