The coloring of plastic pepper balls and plastic hollow pepper balls can improve the appearance quality and internal performance of plastic pepper balls, but the coloring of plastic pepper balls also needs to consider the influence of coloring on the quality and appearance of plastic pepper balls. Therefore, the following seven points must be paid attention to when coloring plastic products:

1. Understand the basic characteristics of plastic pepper balls or plastic hollow pepper balls to be colored, such as brand, origin, performance (especially possible additives), color and so on.

2. Fully understand the performance of all toner materials. The properties of toner materials include: coloring ability, light resistance and external characteristics, high heat resistance, acid resistance, water permeability and water solubility, ethanol permeability, paraffin permeability, oil permeability, toxicity and environmental protection. Among them, the coloring ability, light and ultraviolet resistance, heat resistance, toxicity and environmental protection characteristics should be understood and considered first.

3. The preparation process and the molding conditions of plastic hollow pepper balls should be considered.

4. In the coloring formula, attention should be paid to regulating the proportion of pigments. The amount of pigment is proportional to the shade of color within a certain range. But when it exceeds a certain limit, it is not that the more dosage, the deeper the tone. Usually, its addition is less than 2%, generally less than 1%, and even as low as 0.01% in some cases.

5. In the coloring formula, attention should be paid to regulating the proportion of pigments. The amount of pigment is proportional to the shade of color within a certain range. But when it exceeds a certain limit, it is not that the more dosage, the deeper the tone. Usually, its addition is less than 2%, generally less than 1%, and even as low as 0.01% in some cases.

6. Pay attention to the dual effects of colorants on the properties of plastic pepper ball products. The possible positive effects are: making the plastic environmental pollution products meet the color design requirements, stabilizing (such as shielding sunlight, absorbing acid, etc.), filling and modifying (such as insulation), reducing the linear expansion coefficient and shrinkage rate, etc. The possible negative effects are the reduction of strength and toughness, catalytic aging, poor heat transfer and reduced processability, and toxicity. When matching colors, we should make full use of the positive influence to avoid or reduce the negative influence.

7. On the premise of meeting the color and performance requirements, it should be possible to choose cheap colorants to reduce costs.

The above points are often contradictory in the actual coloring work, and the key is to grasp the key points in the contradiction.