Lightweight coated paper is a professional printing paper that is coated with a special coating to improve its printing effect and quality. It has excellent smoothness and printing properties and is suitable for various printing techniques such as offset printing, letterpress printing and digital printing, etc.
Detection performance
The detection of light-weight coated paper needs to pay attention to the following main properties:
Coating thickness and density: The coating thickness and density of light-weight coated paper will directly affect its printing effect and quality. The detection of coating thickness and density can be carried out by measuring indicators such as coating thickness, coating density and basis weight.
Gloss: The coating of light-weight coated paper needs to have a certain gloss 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.
Flatness: Lightweight coated 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.
Paper strength: Lightweight coated 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.
Color: Light coated 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.
Water absorption: Lightweight coated paper needs to have a certain degree of 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.
Water resistance: Lightweight coated 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.
Environmental protection: light-weight coated 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.
Scope of application: Lightweight coated paper has a wide range of applications, and light weight coated 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.
Machinability: Lightweight coated paper usually needs to be processed such as cutting, folding, and mounting, 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.
Abrasion resistance: Lightweight coated paper needs to have a certain degree of abrasion resistance to ensure the durability and use effect of printed matter. The detection of wear resistance can be carried out by measuring the wear resistance and friction coefficient of the paper surface.
The above performance indicators are the key contents of light-weight coated paper testing, and different use requirements and standards will also affect the testing standards and methods of paper.
