What tests are required before printing the hang tag copperplate paper?

Before printing the hang tag copperplate paper, a series of rigorous tests are usually required to ensure the final printing quality. Here are some key testing items:

1、 Paper thickness test

Purpose: To ensure that the paper thickness meets the printing requirements and avoid printing problems caused by being too thick or too thin.

Method: Use a micrometer or thickness gauge to measure multiple points on the paper, and take the average as the final result.

2、 Glossiness test

Purpose: To evaluate the reflective effect of paper surface and ensure the visual effect and quality of printed materials.

Method: Use a glossiness meter to measure the surface of the paper. Generally, the glossiness of copperplate paper is required to be above 80 degrees, but should not exceed 100 degrees to avoid unfavorable printing effects.

3、 Smoothness test

Purpose: To detect the flatness of the paper surface, ensure that the ink can be evenly distributed, and avoid ink accumulation or unevenness on printed materials.

Method: Use a smoothness meter to measure the paper and evaluate its smoothness by measuring the contact between the paper and a standard plane under specific pressure.

4、 Opacity test

Purpose: To evaluate the ability of paper to block light penetration and avoid transparency during double-sided printing.

Method: Use a reflectivity meter to measure the intensity of reflected and transmitted light on the paper, in order to obtain its opacity value.

5、 Ink absorption test

Purpose: To test the ability of paper to absorb ink, ensure that the ink can dry quickly during the printing process, and avoid ink penetration or diffusion.

Method: 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.

6、 Color accuracy test

Purpose: To ensure that the printed images and text colors are consistent with the original design.

Method: Use a colorimeter to measure the colors on the paper and compare them with standard color values to evaluate the accuracy of printed colors.

7、 Printing suitability testing

Purpose: To evaluate the adaptability of paper to printing equipment and ink during the printing process.

Method: This test typically includes multiple components such as ink layer thickness, color reproducibility, and paper surface compressive strength to ensure that the paper can fit well with other printing materials during the printing process.

In summary, multiple tests such as paper thickness, glossiness, smoothness, opacity, ink absorption, color accuracy, and printing suitability are required before printing the hang tag copperplate paper. These tests can ensure that the paper exhibits good performance during the printing process, thereby improving printing quality and efficiency.