How to check the quality of tag coated paper?

Checking the quality of tag coated paper is a comprehensive process, involving multiple aspects of consideration. Here are some key testing methods and steps:

First, appearance inspection

1. Flatness and smoothness:

Observe whether the surface of the coated paper is smooth, and whether there are obvious ups and downs, wrinkles or bumps.

Touch the surface of the paper, feel its smoothness, high-quality coated paper should feel fine, no rough feeling.

2. Whiteness and color:

Observe whether the whiteness of the paper is uniform, and whether there are obvious color differences or spots.

High-quality coated paper should have a high whiteness to ensure that the printed text and images are colorful and strong in contrast.

3. Incision and edge:

Check whether the cut of the tag coated paper is neat and smooth, without rough edges or jagged edges.

The edge treatment should be fine to avoid damage during subsequent processing or use.

Second, physical performance test

1. Thickness and weight:

Use a thickness gauge or balance to measure the thickness and weight of the paper to ensure it meets production standards or design requirements.

The more stable the thickness and weight, the better the quality of the paper.

2. Smoothness test:

Use a smoothness meter to measure the paper's contact with a standard plane at a specific pressure to assess its smoothness level.

The high smoothness of the coated paper is conducive to obtaining a clear and fine printing effect.

3. Strength test:

Including tensile strength, tear strength and other indicators of the test to ensure that the paper in the printing and use of the process can withstand a certain tension and pressure.

The strength test can be carried out by professional instruments to evaluate the durability of the paper in a digital manner.

Third, printing performance test

1. Ink absorption:

Apply a certain amount of ink on the surface of the paper, and measure its drying time or absorption depth to evaluate its ink absorption performance.

Good ink absorption ensures that the ink dries quickly during the printing process and prevents smudge or diffusion.

2. Color reproduction degree:

By comparing the actual printed sample with the design draft, check whether the color of the printed matter matches the design draft accurately.

Color reproduction is one of the important indicators to measure the quality of printing.

3. Printing clarity:

Observe whether the text and image on the printed matter are clear and delicate, and whether there is ambiguity, double shadow and other phenomena.

Printing clarity is affected by many factors such as paper surface smoothness and ink absorption.

Fourth, environmental protection assessment

Volatile organic Compounds (VOCs) and heavy metals:

Test whether the VOCs and heavy metals content in the paper meet environmental standards to ensure that the product is harmless to the environment and human body.

This requires professional testing institutions and equipment for testing.

To sum up, the quality of the test tag coated paper needs to be comprehensively considered from many aspects such as appearance, physical properties, printing performance and environmental protection. Through strict inspection processes and methods, we can ensure that the quality of the tag coated paper meets the production standards or design requirements, so as to ensure the quality of the final product and brand image.