Plastic color prone to the following issues, in the implementation process should be carefully considered!

01
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Factors to consider when selecting colorants include
① price
Coloring cost is a problem to be considered when selecting a colorant. Should meet customer requirements as far as possible under the premise of choice of inexpensive coloring agent to reduce costs. This includes: on the one hand in the different types of colorants as far as possible the choice of pure pigment, toner and other inexpensive colorants, on the other hand in the same colorant in the choice of cheap colorants, the general coloring costs are limited.

② physical properties
The choice of colorant must take into account the order requirements. Such as the country, the use of the environment. Europe, the United States on human products are toxic elements of the content of very stringent requirements.
In addition, such as outdoor products, you can not use the weatherability of the poor colorants; belongs to the S zone 'can not choose to contain Cr, Pb and other colorants; customer demand is not high, the dispersion of slightly cheaper colorants.

③ hue
Hue choice is the most difficult problem, experienced color master often mistakes. Usually red, yellow, blue, called the primary colors. From these three kinds of primary colors in any two mixed with each other, you can get a variety of other colors, such as red and yellow get big red, orange, apricot yellow, and a variety of color hue is not simple, the total with other shade , Often referred to as the taste, the color to live when they are not close to the cause color is very difficult, such as with orange with yellow and red deployment, the use of red with yellow and red with yellow flavor can be equipped with a distinctive orange , If the use of blue and yellow with purple flavor red deployment. Will become a distinct orange. Therefore, the choice of particular attention to the distinction between taste, a full understanding of each coloring agent. In order to carry out the right color.

02
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Colorant quality is not stable
The quality of the coloring agent is unstable, often manifested in its concentration changes, which affect the effectiveness of the formula. This is also often found in the color of the problem. Should choose a better quality, good reputation of the plant that the establishment of long-term cooperative relationship, another effective measure is to test each batch of incoming goods to determine the hue, the concentration difference. To properly modify the formulation.

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Colorimetric judgment error
In the process of checking the most prone to the problem is colorimetric wrong judgment, judgment errors are mainly caused by the lack of experience, usually only by the usual practice. And continue to enrich the experience to solve the appropriate application of some instruments such as colorimetric instrument can also help to determine the correct, in addition to the following factors affect the judge:

① light effects
In different light source samples and sample color difference is not the same. This is because the color is difficult to achieve complete agreement are generally metamerism. So even in a light source seems completely consistent, but in other light sources may have small differences. So the color should be if the typical light source (sunlight, tungsten, fluorescent, UV light) should be consistent under the same qualified, but in practical applications, according to the general use of products and select the light in this light can be consistent.

② the surface state of the impact
Different surface of its light reflection is different, such as a product, rough surface on the smooth surface of the deep, dark, so the color should try to make the surface state consistent. If the pvc tape color, due to different surface conditions (gloss, embossed, etc.), should be the sample and the sample side by side, on which transparent adhesive tape to compare or immersed in water, these practices are the surface state into Consistent.

③ thickness of the impact
Different thickness of the products to the human eye is not the same feeling; the thickness of the smaller than the light, lighter color, so color should try to make the sample and sample thickness consistent, can not be consistent when extrapolated, such as 0.4 mm film test Sample and 0.2 mm film samples the same color, you can sample the amount of pigment in the formula to double, you can get the approximate formula.

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Weighing error
Weighing errors is also an easy mistake. Coloring operations are generally small amount of coloring agent, weighing a little will not lead to a significant change in color, especially in weighing toner, because of its light weight, easy to fly. Should be more careful, are generally used electronic balance, closed structure, the accuracy of not less than milligrams.

In addition to the above-mentioned points, the problems are prone to record errors, such as clean car clean.

Plastic color is a very difficult technical work, a slight negligence will be wrong, to produce significant losses. Only a large number of practical exploration and master the principle of color matching, in particular, master the performance of each coloring agent to be handy, its capability. If conditions permit, the use of colorimeter and other auxiliary equipment can reduce the difficulty of color, improve the success rate.

Strength of the color

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