A detailed analysis of the standard design for color printing
According to the instructions on the ink density range can be used for any ink overprint sequence, namely YMC, YCM, CMY, CYM, MCY or MYC. But printing design is every sequence have the same color? In fact is not.
Even if the site density is controlled in absolute value, the design of each printing overprint sequence will produce different superimposition of red, green, blue, because each print design printing ink formulation have different attributes, such as the impact of the ink transparency cover rate. So, first printing (printing design) surface of the ink drying film can will affect the post printing (printing design) wet ink adhesion property.
In print design, ink color reproduction is using different mixing ratio, to get the colour spectrum tone value. Three color printing ink in the substrate printed design density correct and balanced or not and print designers have direct relationship. Printing design operating personnel though only in a limited range measurement, set the ink density, but the density range can help designers obtain the overprint printing ink color wide range, regardless of whether the ink transparency, or substrate is white. In print design we can very convenient to find the density range in various related publications: such as the FIRST and SWOP standards are specified in.
Yellow pigment coverage is poor, magenta and cyan pigments for coverage. But the surface yellow pigment ink can be high.
In the first step of color printing design management is to determine the best ink to overprint order and can provide high in density balance of color range.
The ratio of visual GATF Association developed a simple color hexagon color map to different colors in many years ago. Density meter can measure hue deviation, grayscale and color superimposition to display and compare the merits of primary colors.
For example, three angle mutually presence in hexagonal color map is ideal ink color reproduction (YMC), the other three corners is superimposed composite color (RGB), hexagon center is a neutral color (white to gray to black). The larger the ink color intensity, the more close to the corners, more from the neutral color.
When the actual print design printing color and composite color distribution to the hexagonal color diagram, three color printing ink (CMY) and composite color (RGB) density, color difference and gray value is revealed.
Because the ink is not too ideal, distribution of hexagonal (irregular) will not work with the whole ideal hexagonal color chart size, but it can be used for the optimization of printing. Therefore, the use of GAFT method for irregular hexagonal distribution to display print design colors and composite color information, we can get the best density and trapping sequence.
By covering the region size measuring color determines the ink color is comparative strength properties and printing design colors, of course, area the bigger the better.
Other density values can also be used as part of a printed design of measuring the distribution order, such as the color of the 25% dot, dot, dot density value of 755 505.
If the distribution of these other color value of concentration that printing design is under control, on the contrary, distribution is centralized means printing design is out of control, it shall make the necessary adjustments.