Testing performance of copperplate base paper

Coated base paper is a professional printing paper, usually used for copper plate printing or gravure printing. It has a high degree of smoothness and uniformity to ensure the printing effect and quality of printed matter.

Detection performance

Coated base paper usually needs to have the following main properties:

1. Flatness: Copper plate base paper needs to have good flatness to ensure the printing effect and quality of printed matter. The detection of flatness can be carried out by measuring the smoothness of the paper surface, the height of hairiness and the convexity of the board.

2. Glossiness: Coated base paper needs to have a certain glossiness to improve the visual effect and quality of printed matter. The detection of gloss can be carried out by measuring the reflectivity and specular reflectivity of the paper surface.

3. Paper strength: Coated base paper needs to have a certain strength to ensure its stability and durability. The detection of strength can be carried out by measuring the tensile strength, tear strength, folding endurance and other indicators of paper.

4. Water absorption: Copperplate base paper needs to have certain water absorption to ensure its stability and printing effect during the printing process. The detection of water absorption can be carried out by measuring the water absorption speed and degree of water absorption of paper.

5. Color: Coated base paper needs to have a certain color to ensure the color reproduction and quality of printed matter. The detection of color can be carried out by measuring the color difference value and color uniformity of paper and other indicators.

6. Water resistance: Copper plate base paper needs to have certain water resistance to ensure the durability and use effect of printed matter. The detection of water resistance can be carried out by measuring the time and water absorption rate of paper soaked in water.

7. Environmental protection: copperplate base paper needs to meet environmental protection standards, contain no harmful substances, and have no pollution to the environment. The detection of environmental protection can be carried out by measuring indicators such as volatile organic compounds, heavy metals, chloride ions and fluorescent whitening agents of paper.

8. Scope of application: coated base paper is widely used, and coated base paper for different purposes needs to have different performance requirements. The detection of the scope of application can be carried out by measuring indicators such as the applicable environment of the paper, the applicable painting technology and the applicable printing process.

9. Machinability: Coated plate base paper usually needs to be processed such as cutting, folding, mounting, etc., so it needs to have a certain degree of machinability. The detection of processability can be carried out by measuring the performance change and loss of paper in different processing processes.

10. Printing quality: The printing quality of coated base paper is one of its important performance indicators. The detection of printing quality can be carried out by checking the printing effect, line clarity, color reproduction and other indicators of printed matter.

11. Paper thickness and uniformity: The thickness and uniformity of the coated base paper will directly affect the printing effect and quality of printed matter. The detection of thickness and uniformity can be carried out by measuring indicators such as paper thickness, basis weight and thickness difference.

The above performance indicators are the key content of copperplate base paper detection, and different use requirements and standards will also affect the detection standards and methods of paper.