Cultural paper is a special-purpose paper used for printing books, magazines, newspapers and other cultural publications, as well as making artwork, picture albums, greeting cards, etc. Compared with ordinary paper, cultural paper requires higher properties such as smoothness, whiteness, gloss, thickness, strength and stability.
The detection of cultural paper mainly includes the following aspects:
Smoothness: The surface of fine paper should be very smooth to ensure clarity and detail in text and images. The detection of smoothness can be carried out by measuring the smoothness of the paper surface, the height of hairiness and the convexity of the board.
Whiteness: The whiteness of cultural paper needs to reach a certain standard to ensure the color reproduction and contrast of printed text and images. The detection of whiteness can be carried out by measuring the color temperature and color difference of the reflected light of the paper.
Glossiness: Cultural paper needs to have a certain glossiness to enhance the visual effect of printed matter. The detection of gloss can be carried out by measuring the reflectance of the paper surface.
Thickness and density: Cultural paper needs to have a certain thickness and density to ensure the stability and durability of the paper. The detection of thickness and density can be carried out by measuring the thickness and density of paper.
Strength: Graphic paper needs to be strong enough to withstand the tension and pressure of the printing process. The detection of strength can be carried out by measuring the tensile strength, tear strength and compressive strength of paper.
Oxidability: Cultural paper needs to have a certain degree of durability, and it is not easy to turn yellow, age, rot, etc. The detection of oxidation can be carried out by measuring the pH value, pH and peroxide index of the paper.
Printing performance: Cultural paper needs to have certain printing performance to ensure the printing quality of printed matter. The detection of printing performance can be carried out by measuring the water absorption, oil absorption, printing clarity, color reproduction and printing pollution resistance of paper and other indicators.
Environmental protection: Cultural 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.
The above performance indicators are the key content of cultural paper testing, and different use requirements and standards will also affect the testing standards and methods of paper.
