How to judge the quality of self-adhesive copperplate label paper?

To judge the quality of self-adhesive copper plate label paper, it can be comprehensively investigated from the following aspects:

1. Quality of surface material

Material selection: The surface material of self-adhesive copperplate label paper should be high-quality copperplate paper, with good printability and gloss.

Physical properties: Check whether the thickness, stiffness and flatness of the paper meet the requirements, and ensure that the label is not easily deformed or damaged during use.

Waterproof and oil-proof performance: Check whether the label is waterproof and oil-proof according to the purpose of the label to meet the requirements of special environments.

2. Printing quality

Color uniformity: Observe whether the color of the label paper is uniform, no obvious color difference, color spots and other phenomena. High quality printing should ensure bright and stable colors.

Clarity: Check that the text, graphics and colors on the label are clear and accurate, without blurring, deforming or gaping problems.

Printing accuracy: Evaluate whether the error of the printed matter is less than the specified value, and ensure that the size and shape of the label meet the design requirements.

3. Adhesive properties

Viscosity test: Use tools such as a handheld viscometer to test the adhesion of the label to ensure that it meets relevant standards. The adhesive should be able to stick firmly to various surfaces and be easy to tear off without leaving residue.

Weather resistance: Place the label under different environmental conditions (such as high temperature, low temperature, humidity, etc.) and observe its viscosity changes to assess its weather resistance.

4. The quality of the bottom paper

Isolation performance: The backing paper should have good isolation performance to ensure that the label can be easily removed from the backing paper without damaging the label itself.

Integrity: Check the backing paper for problems such as breakage, wrinkles or adhesion, which may affect the peeling effect and storage stability of the label.

5. Appearance quality

Surface flatness: Check whether the surface of the label is smooth and free of bubbles, wrinkles, stains, and scratches.

Edge uniformity: Observe whether the edges of the label are neat, without obvious rough edges or damage. Unevenly cut labels may affect their overall beauty and use effect.

6. Environmental protection and safety

Material safety: Check whether the label material meets the requirements of environmental protection and whether it contains harmful substances. For labels that need to touch food or drugs, more attention should be paid to their safety.

Environmental standard test: Test under relevant environmental standards to ensure that the material of the label paper is safe and harmless and meets the relevant regulations.

To sum up, judging the quality of self-adhesive copper plate label paper needs to be comprehensively considered from the aspects of surface quality, printing quality, adhesive performance, base paper quality, appearance quality, environmental protection and safety. Only the label paper that meets the requirements in these aspects can be considered a high-quality product.