How to identify high quality three heat sensitive paper?

The identification of high-quality heat-resistant paper can be considered from the following aspects:

First, observe the appearance and texture

1.Color and gloss:

The color of high-quality heat-resistant paper should be slightly green, rather than too white. Too white paper may have added too much phosphor, poor quality.

The surface of the paper should have a high gloss and smoothness, and the surface of the printed paper is smooth and easy to print.

2.Finish and uniformity:

Observe the paper finish, good quality paper finish moderate and uniform, no obvious reflected light phenomenon.

Paper coating should be uniform, no obvious color block uneven or small stripes.

Second,Physical test

1.Waterproof test:

Soak the printed paper completely in water for at least an hour. After removal, observe the paper and handwriting for changes. If the paper is completely unaffected and there is no change in the writing, it is a true three-proof paper.

2.Tear proof test:

Try to tear paper by hand, the real three-proof paper in the case of no gap is torn constantly. If the paper is easily torn, it may be a counterfeit product.

3.Fire test:

Use a lighter to heat the back of the paper and observe the color change of the heated part. 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. If the color is brown or there are small streaks, uneven color blocks, it may indicate that the thermal sensitive formula is not reasonable or the coating is not uniform.

Third,Chemical and light reaction test

Highlighter test:

Apply the printed paper with a highlighter and put it in the sun to see how quickly the paper turns black. Paper with fast blackening speed may be stored for a shorter time, and high-quality heat-resistant paper should have better resistance to light aging.

Fourth,Consider application scenarios and brand reputation

1.Application scenario matching:

Select the appropriate heat-proof paper according to the actual use scenario. For example, for labels that need to be stored for a long time or exposed to harsh environments, three heat-proof papers with higher wear, water and oil resistance should be selected.

2.Brand and Supplier reputation:

Choose reputable brands and suppliers to reduce the risk of buying counterfeit products. The reputation of brands and suppliers can be understood by consulting market evaluations and user feedback.

To sum up, the identification of high-quality heat-resistant paper needs to be comprehensively considered from many aspects such as appearance, texture, physical testing, chemical and light reaction testing, application scenarios and brand reputation.