What is the reason for the color difference of plastic products?

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1. The impact of raw materials for plastic products

The characteristics of the resin itself have a great influence on the color and gloss of plastic products. Different resins have different tinting strengths, and some plastic materials come in different colors. Therefore, it is very important to consider the material and color of the raw material itself in the design of the plastic coloring formula. The shade of raw materials is also a factor that cannot be ignored in plastic color matching, especially when configuring white or light-colored plastics. For plastics with better light resistance, the formula can be considered according to its original color, while for plastics with poor light resistance, when considering the coloring formula, the factor of poor light resistance and easy discoloration must be considered in order to obtain good results.

2. The influence of plastic product dyeing agent

Plastic dyeing is generally done by masterbatch or dyeing granulation (toner). Dyeing agent is the most important factor for the color difference of plastic parts. The color quality of plastic parts directly depends on the quality of the base color of the dyeing agent. Different dyes have different color thermal stability, dispersibility, and hiding power, which will lead to large deviations in the color of plastic parts.

3. The influence of plastic product processing technology

During the dyeing process of plastic parts, the temperature of injection molding, back pressure, equipment technology, environmental cleanliness, etc. will cause large deviations in the color of plastic parts. Therefore, the consistency of injection molding equipment and environment must be maintained. A stable injection molding process is a key step to ensure that the color difference of plastic parts is within the acceptable range.

4. The influence of light source on the color detection of plastic products

Color is a visual reflection produced by light acting on the human eye. Under different light source environments, the reflected colors of plastic products are different, and the brightness and darkness of the light will also cause obvious sensory differences, resulting in psychological distress for users. In addition, the angle of observation is different, and the angle of light refraction will also be different, resulting in visual color differences.


Post time: Jul-06-2023