How does the gift box improve hue saturation? Hue is the most basic characteristic of color, people refer to colors as red, yellow, green and so on. Hue is determined by the reflection of the surface of an object onto the optic nerve of the human eye. For monochromatic light can be determined by the wavelength of its light. If the color of the mixed light is composed, the color phase is determined by the ratio of the amount of light of the mixed light. For example, under the sun, the surface of the printed matter reflects the color of the wavelength of 500 ~ 550nm, while the color of other wavelengths is absorbed relative to the color of other wavelengths.
1. The color phase can be represented by the shape of the spectral reflectance curve. Curve A indicates that the color of the object is green, and curve B indicates that the color of the object is green and blue.
2. The brightness
In photometry, the brightness of the color is described as the value of light (that is, the energy of light). You can measure it with a photometer. It is generally believed that color high reflectivity on the surface of the object and their intensity is big, A, B two kinds of color hue is the same, but the brightness of A color is greater than B, and so on the vision of A and B two kinds of color is differ
3. Degree of saturation
Saturation (also called chroma) refers to the purity of color, which can be seen in the most saturated colors. The more white light is added to the spectrum, the more unsaturated it becomes.
Object color saturation depends on the object surface reflection spectrum selectivity of radiation, the object of a narrow band spectrum reflectance is high, and the other wavelengths of reflectance is low or no reflection, the color degree of saturation is high.
1. Outlets are brighter in the color print part in yellow, magenta, blue and black each piece of plate and light phase modulation corresponding parts of the original network coverage is small, sparse network distribution, thus print brighter part of the network is mostly in the parallel state.
When the yellow dot and the magenta node are juxtaposed, the white light hits the yellow dot, the yellow dot absorbs the blue light and reflects the red and green light; The white light hits the poinsettias and the magenta branches absorb the green light and reflect the red and blue light. The four colors are mixed in space, and in accordance with the color and color method, red light, green light, and blue light are mixed into white light, while the rest is red light. If the distance between the two nodes is very small and the distance is very close to each other, the human eye sees red. Similarly, magenta and green dots are juxtaposed with blue dots, green dots and yellow dots looking green.
When the two branches are juxtaposed, the colors that are produced are colored by the side of the large dot, such as the large green dot and the small luhong dot.
Yellow, magenta, blue three node coordinate, because the ink absorbs some colors, the paper also have different absorption to light, not 100% of reflected light, when the distance between the dot is very small, the human eye see is grey.
Dark color part of color print, yellow, magenta, blue and black each piece of plate and the original dark phase-modulation rate of corresponding parts of the site are big, branches densely populated, so print dark color part of the network are mostly in a composite state.
When product red dot superimposed on yellow dot, Bai Guangxian exposure to the magenta outlets, green light is absorbed in the white light, red light, blue light transmission to the yellow dot, blue light is absorbed by the yellow dot, through exposure to white, magenta branch again from its reflection on paper only red light, the human eye to see red. In the same way, lu hong and the green dot are seen in blue, and the green dot and the yellow dot are seen in green. Yellow, magenta, green trichrome dot overlay together, the blue, green, red light in white light is absorbed, the human eye sees is black.
The way of the mesh reproducing color is affected by the transparency of the ink, the ink with low transparency is colorless and the completely opaque ink can only be printed as the first color.
The middle part of the printed matter is rich in layers, and the way in which the color is synthesized is the dot and dot.
According to the principle of dot and dot reproducing color, you can see how much ink absorbs color, the thickness of ink layer, the color concentration of ink, the order of printing, all affect the appearance