What are the quality inspection methods for circular colored copperplate paper?

The quality inspection methods for circular colored copperplate paper mainly include the following aspects:

1、 Physical performance testing

Thickness detection:

Use a professional thickness gauge to measure the thickness of circular colored copperplate paper, ensuring that the thickness meets the standard requirements. According to international standards, the thickness error of copperplate paper should not exceed ± 3%.

Area density detection:

Evaluate the area density of paper by measuring its weight per unit area. According to international standards, the area density error of copperplate paper should not exceed ± 5%.

Slip detection:

Use a smoothness meter to measure the smoothness of the surface of circular colored copperplate paper, as smoothness directly affects the clarity and color reproduction of printed materials. According to international standards, the slip error of copperplate paper should not exceed ± 15%.

2、 Liquid absorption performance testing

Water absorption test:

Apply a certain amount of water to circular colored copperplate paper, and then measure the amount of water absorbed to ensure that the water absorption meets the standard requirements. According to international standards, the water absorption error of copperplate paper should not exceed ± 10%.

Oil absorption detection:

Similar to water absorption testing, but using ink or other oily liquids. Oil absorption is also one of the important indicators for measuring the quality of copperplate paper.

3、 Optical performance testing

Glossiness detection:

Measure the glossiness of circular colored copperplate paper using a glossiness meter, which is an important indicator for evaluating the visual effect and quality of printed materials. Conducting glossiness testing under standard light sources can ensure the accuracy of the test results.

Whiteness detection:

Measure the whiteness of paper to evaluate its ability to reproduce colors. High whiteness paper can better display color effects during printing.

4、 Chemical composition and harmful substance testing

Ingredient testing:

Analyze the chemical composition of circular colored copperplate paper to ensure compliance with relevant standards and regulations. For example, it can detect the fiber content, filler type and content in paper.

Hazardous substance detection:

Detect whether the paper contains harmful substances such as heavy metals, fluorescent whitening agents, and harmful solvents to ensure the environmental performance and safety of the product.

5、 Coating strength and toughness testing

Coating strength testing:

Evaluate the firmness and wear resistance of circular colored copperplate paper coatings through specific testing methods. Paper with high coating strength can better maintain color and image quality during printing and use.

Resilience testing:

Measure the tear resistance and flexural strength of paper to evaluate its toughness. Paper with good toughness is not easily damaged or deformed during processing and use.

In summary, the quality testing methods for circular colored copperplate paper involve multiple aspects, including physical properties, liquid absorption properties, optical properties, chemical composition and harmful substances, as well as coating strength and toughness. Through comprehensive quality testing, it can be ensured that the quality of circular colored copperplate paper is stable, reliable, and meets relevant standards and customer requirements.