A. According to the nature of the ink printing color sequence
1) ink transparency and hiding power depends on the pigments and the connection of the difference of the refractive index of the material. Transparent ink multi-color overprint, ink layer under the colored light can pass through the ink layer, achieve good color mixing effect, bright colors. Ink transparency contrast sequence is as follows: generally yellow > magenta > > black, so poor transparency ink printing first, after the transparent ink printing.
2) ink viscosity consider printing color sequence. Four color printing ink, every variety of ink viscosity, viscosity of like commonly, ink > green > magenta > yellow, so commonly used in four-color printing press of black, green, magenta, yellow, color series increase dieyin soundness is to prevent "channeling" phenomenon, ink color change, caused by the images of trance, color dark, matt. Two-color machine adopts green, magenta and black, yellow, color series ink strong ablility, dry, prevent ceng dirty.
2. According to the printing design printing color sequence is determined
According to the content of the printing design, in accordance with raised frame main colour principle, in order to prevent the main color covered, generally the main color version before printing, such as portrait, full of red leaves, autumn scenery pictures, need to strengthen the warm color attune jump in black, blue, printed after the magenta, yellow; Like spring scenery scenery, landscape or snow mountain, must strengthen the cool color to move, the first printed after the black, magenta, blue, yellow.
3. Layout ink quantity size printing color sequence
Whether it is monochrome or polychromatic machine, multi-color printing is always printed the color printing color version, if the large field version of the arrangement in the first color printing, printing other shallow ink quantity. Printing effect is not ideal, easily scratched, absorbency, outlets, hard and dry. According to jump in shallow ink quantity, large amount of ink after the medium color series.
Double color machine color version also should match following the plate big and small amount of ink printing, the principle of large amount of ink plate put the second group of color, can prevent "into color".
4. According to the requirement of overprint of printing color sequence
1) four-color overprint. Because of the deformation of paper suction or factors such as its resistance to tension, as well as subject and plate making overprint. Such as error pages dark look of text for four color words, monochrome printing machine can use yellow, magenta, blue and black printing order, supplement of gray balance and strengthening the image contour; Some original often flush field text dieyin green, magenta, once a set of guidelines is not beautiful, if the magenta and yellow dieyin the red text for overprint, the topic of performance is not very significant. In two-color machine should use green, magenta and black and yellow version of printing color sequence, the effect is more ideal.
2) print golden silver. Gold and silver ink absorption ability is very small, as far as possible on the final color printing; But two strong hiding power, oil field version will cover the full of color. Plate making topics have to be considered, gold or silver color piece pressure four-color printing text, images or whether hollow out processing, not hollow out, the jump in gold or silver, if not pay attention to such questions, will be written content on the loss phenomenon.
3) field edition printed on black text. Often encountered in printing, first printed black text after the magenta, yellow, or the color version of the text slant red or yellow, should choose printed color field after the first black text version of the printing color sequence.
5. The paper properties of different color sequence should be considered
Color up chooses different paper, paper whiteness, smoothness, and ink absorbency, fiber loose, powder dropping off different degree; The properties of the coated paper is not random, other paper, such as offset paper, writing paper, white board paper, cloth, such as surface coarse, poor resistance to tension, in order to make up for the shortage of the paper surface, can print yellow version first render.
6. The visual effect of the printing color sequence
Monochrome printing machine in the past often yellow version of the arrangement in the first color printing, in weak light yellow ink on the vision, the ink is uncertain. Can choose the color in the color printing, such as green, magenta, yellow, black, color series of visual or as required, then, at the same time prevent because of the distance of time is too long, yellow version of rapid drying, and produce vitrification phenomenon.
In the process of producing, for printing color sequence should sum up experience, in view of the different printing equipment, paper, ink, and different manuscripts. By reference to the sample, check the printing blocks, choose accurate printing color sequence, will get a satisfactory superimposition effect. (Gold Printing Group) |
