Basic principle of color matching
We all know that the plastic color matching process is more complicated, but in order to obtain the desired color matching effect quickly, accurately and economically, the general color matching staff will observe the following principles in the masterbatch factory:
01
The fewer colorants you choose, the better, also known as the "small amount" principle.
Can use two pigments to match the standard color, it will not use three kinds of pigments, the more varieties of pigments used, not only the color matching trouble, but also bring more trouble to the production of the latter masterbatch, and bring in complementary colors to make the distribution The color is grayed out.
Moreover, the more varieties of pigments are selected, the greater the systematic errors caused by the dispersibility and tinting strength of these varieties to the color matching samples and production.
02
The selected colorants have similar properties such as heat resistance, dispersibility, and light resistance, and are also called "similar" principles.
If the difference in heat stability is relatively large, temperature changes during processing will cause color changes, so plastic color matching should be selected for similar heat resistance.
If the dispersity difference is too large, the color of the difficult-dispersible pigment and the easily dispersible pigment will change color due to the change of shear force during the processing. Therefore, the color matching of the masterbatch should be similar.
If the prepared plastic products are too different due to the difference in performance, the color change will be severe after outdoor exposure, so the masterbatch color matching should be selected to have similar light fastness and weather resistance.
03
Prevent the introduction of complementary colors, also known as the "complementary color" principle.
The primary colors other than the two primary colors synthesized are called complementary colors, orange is red and yellow, blue is complementary; green is yellow and blue, red is complementary; purple is red and blue, and yellow is complementary.
If the complementary color is introduced during color matching, the original color light will become dim, affecting the brightness of the pigment. For example, when adding a small amount of complementary color to yellow and blue, the purple color will be darker, and more complementary colors will be introduced. Gray.
Then there is to pay attention to the different color of the pigment when color matching, such as carbon black and titanium dioxide for plastics, respectively, due to different particle sizes, blue and yellow, respectively, the color difference of the pigment is greater, avoid using complementary color pigments to match color, otherwise it will Reduces saturation and darkens color.
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