How is the color stability of BOPP color synthetic paper affected by environmental factors

The color stability of BOPP color synthetic paper is indeed affected by environmental factors, mainly including light, temperature, humidity and exposure to chemical substances. The following is a detailed analysis of how these environmental factors affect the color stability of BOPP color synthetic paper:

First, lighting

1.Ultraviolet radiation: Long-term exposure to strong sunlight, especially ultraviolet radiation, will cause changes in the molecular structure of the pigment, which will cause color fading. Ultraviolet light can break the chemical bonds in pigment molecules, causing the color to fade or change.

2.Light intensity and duration: The greater the light intensity and the longer the duration, the more significant the impact on color stability. Therefore, when using or storing BOPP color synthetic paper outdoors, special attention needs to be paid to sun protection measures.

Second, temperature

1.High temperature accelerates aging: A high temperature environment will accelerate the thermal movement of pigment molecules and increase the interaction between the pigment and the surrounding environment, resulting in color fading or change. In the high temperature environment for a long time, the color stability of BOPP color synthetic paper will be greatly affected.

2.Temperature difference: Rapid changes in temperature can also adversely affect color stability. For example, under extreme temperature difference conditions, the binding force between the pigment and the substrate may weaken, causing the color to fall off or change.

Third, humidity

1.The effect of humidity on the stability of pigments: Changes in humidity may affect the bonding fastness between pigments and substrates. High humidity can cause pigment molecules to absorb water and expand or dissolve, changing the color expression. However, it is important to note that both extremes of relative humidity (very dry and very wet) can adversely affect ink performance, thus affecting the color stability of the print.

2.The effect of moisture on paper: Although BOPP color synthetic paper is based on plastic film, it may still be affected by moisture in some cases (such as composite paper). The paper will expand or deform after moisture absorption, which may affect the overprinting accuracy and color stability of the printed matter.

Fourth, chemical exposure

1.Strong acid and alkali: Although the BOPP substrate has a certain chemical stability, long-term contact with chemicals such as strong acid and alkali may still cause color fading or damage to the substrate.

2.Organic solvents: Some organic solvents may have a dissolving effect on pigments, which can destroy the stability of pigments and cause color changes. Therefore, contact with these solvents should be avoided during use or storage.

Fifth, other factors

1.Oxygen and ozone: Oxygen and ozone in the air may also oxidize pigment molecules, causing color fading or changes. Especially in heavily polluted environments, this is more likely to occur when ozone concentrations are high.

2.Mechanical friction and scratching: Although BOPP color synthetic paper has a certain wear resistance, long-term mechanical friction or scratching may still cause the surface coating to wear off, thereby affecting the color stability.

To sum up, in order to maintain the color stability of BOPP color synthetic paper, it is necessary to pay attention to avoid adverse conditions such as long-term exposure to strong sunlight, high temperature and humidity environment, and exposure to chemical substances. At the same time, care should also be taken to avoid physical damage such as mechanical friction and scratching during storage and transportation.