Why Does The Gift Box Change Color

Gift boxes, most people will have a question, that is, why the color of the gift box that has been used for a long time? In fact, there are two basic reasons for the color change of the outer packaging and printing part of the gift box that has been used for a long time. : Oxidation reaction and ambient temperature.

Oxidation reaction: Let me talk about the problem of the ink first, the composition of the ink. There are many coating additives such as desiccant and antioxidant in the ink, and it is not easy to be oxidized after drying. Ink is a uniform mixture of colored bodies (such as dyes), additives, fillers, additives and other chemical substances; used to complete packaging printing and dry on the printed body; it is colored and has corresponding fluidity The thick viscous body. Therefore, color tone, waist and knee thinness, fluidity and drying performance indicators are the three important performance indicators of ink. There are many varieties of them, and their physical performance is also different. Some are very thick and sticky, while others are very thin. Some use vegetable oils as additives; some use epoxy resin and organic solvents or water as additives. These are determined in accordance with the goal of packaging printing, namely the printed matter, the printing method, the type of printing plate and the drying method. Therefore, over time, the outer packaging and printing parts of the gift box will appear discolored. One of the fundamental reasons is that the ink does not meet the standard requirements.

Ambient temperature: The sun's ultraviolet rays can damage printed materials. The color of inkjet products will fade after being exposed to the sun for a long time. Therefore, the way to store the gift box is that the gift box should not be directly touched by the sun.

Everyone understands that ink is a chemical product. Changes in chemistry are closely related to environmental temperature, environmental humidity, and catalysts.

If the indoor temperature and environmental humidity of the paper gift box are not suitable for storage, especially if it is catalyzed under light, because the light source of the sun and light is light yellow, the surface will be covered with light yellow over time. The paper gift box looks yellowish and old, turning to blue-green.

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