corrugated box 2
Inspection and control of printing quality of special materials
In the color box packaging, the application and innovation of special materials and new materials is a trend, such as the development of cigarette packs from paper soft packs and cardboard hard packs to aluminum foil gold and silver cardboard hard packs. These high-gloss composite or coated materials have metallic luster and refraction surface. After being printed with exquisite patterns of various colors, people feel high-end and elegant, which can greatly increase the value-added space of products, and are widely used in high-end color boxes.
Such high-gloss surface materials have strong metallic luster due to the smooth surface coating, and strong specular reflection occurs when incident light is irradiated. Therefore, the color appearance of the surface of the object will change with the change of the observation angle, which makes it difficult to control the color in the printing production process, so that the printing factory is faced with ensuring that the same batch of printed products, and even different batches of printed products, have the same ink color. The quality control problem and its special testing technical requirements.
The color box printed with special materials has many spot colors and anti-counterfeiting processes in addition to four-color printing color pictures, and its inspection contents include density, dot enlargement, registration and gloss. Due to the limitation of the surface gloss of special materials, in the measurement of density and dots, it is necessary to use a test instrument that uses d/0 to measure optical geometric conditions. Color spectral reflectance, and then obtain color CIELab value and color difference spectrometer, such as X-Rite's SP series. Thus, the accuracy and reliability of the measurement data of high gloss surface materials are guaranteed. Measuring instruments that are applied to the 0/45 geometry of common materials, such as the X-Rite900 series, cannot achieve consistent and accurate results.
corrugated mailers
