White cardboard is a commonly used printing paper material, which is usually used to make high-end printed matters such as business cards, hang tags, packaging boxes, and cards.
Detection performance
It needs to have the following main properties:
Whiteness: White cardboard needs to have a certain degree of whiteness to ensure bright colors and clear images of printed matter. The detection of whiteness can be carried out by measuring the reflected light brightness and chromaticity coordinates of the paper surface and other indicators.
Printing quality: The printing quality of white cardboard includes indicators such as image clarity, color reproduction and printing speed. The detection of printing quality can be carried out by checking the printing effect, line clarity, color reproduction and other indicators of printed matter.
Thickness and uniformity: The thickness and uniformity of white cardboard 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, density and basis weight.
Strength: White cardboard needs to have a certain strength to ensure the stability and durability of printed matter. The detection of strength can be carried out by measuring the tensile strength, flexural strength, compressive strength and other indicators of paper.
Abrasion resistance: white cardboard needs to have a certain degree of wear resistance to ensure the durability and use effect of printed matter. The detection of wear resistance can be carried out by measuring the coefficient of friction of the paper surface, the degree of wear resistance and other indicators.
Environmental protection: White cardboard 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: The scope of use of white cardboard is mainly on high-end printed matter, such as business cards, hang tags, packaging boxes, cards, etc. The detection of the scope of application can be carried out by measuring indicators such as the applicable environment of the paper, the applicable printing variety and the applicable processing technology.
The above performance indicators are the key content of white cardboard detection, and different use requirements and standards will also affect the detection standards . In addition, since white cardboard is usually used in the production of high-end printed matter, its appearance quality is also a very important indicator, which requires appearance inspection, such as surface flatness, surface gloss, surface smoothness, and no surface defects.
