Chromatic different spectrum and the principle of color

In the packaging printing, the color effect of printed matter has a very important influence on the product packaging. It will not only enhance the quality of the product packaging, but also attract consumers and enhance the user's desire to purchase. However, in the packaging and printing, sometimes the printing factory and the customer both agree that the printing color is satisfactory. When printed on the packaging of the specific product, the color is deviated, sometimes the difference is still relatively large, so that the packaging of the product is not satisfactory, which is exactly where What's wrong? There are no exceptions in checking printing equipment, materials, and operating techniques. In fact, this is a phenomenon of metamerism in color science. From this it can be seen that metamerism has a great influence on packaging printing. Therefore, it is necessary to fully understand the principle and control method of this phenomenon and avoid this phenomenon of color aberration. Loss caused by packaging and printing manufacturers.

Chromatic different spectrum and the principle of color

Each object has its own fixed optical properties, that is, which color light it absorbs, and the nature of the reflected light is fixed. The color of each object is fixed in the full spectrum of sunlight. The so-called intrinsic color does not change, but refers to the optical properties of the object and the color appearing in sunlight. However, when the spectral composition of the light source is changed, both the monochromatic light of a certain wavelength range is missing in the light source, and the color light of this wavelength range is the color light reflected by the optical characteristics of an object. Under the light source does not show its inherent color, and presents different colors. This is when a pair of colors appear in the same color under a certain light source, but under another light source, the color it presents changes, this phenomenon is called metamerism. In this change, the spectral data of the object itself does not change, that is, the spectral data describes the surface properties of the colored object. Unlike the observer, the copying method differs from the observer in that the copying method has no effect, and the object color and reflection (transmission) ) The spectral power distribution of light is related but not one-to-one, and thus many light energy with different spectral distributions cause the same color sensation (ie, color mixing metamerism) of the human eye.

In color printing, the three primary colors YMC are usually used to simulate the reproduction of various colors in nature. However, for the human eye, the RGB color light is most sensible, that is, the color recognition method is based on the principle of additive color. Therefore, for the human eye, the color light and the color material are equivalent, which produces a phenomenon of metamerism, which is mainly due to the low resolving power of human eyes.