Offset Printing In Yellow Ink And Note The Importance Of - Yellow, Yellow Ink Printing, Offset

Yellow as one of the three primary colors, seems to be different from other colors

. Because Offset printing , Most of the yellow ink as the first color to print. To this end, yellow version of the ink, the reproduction order harmonic minor level, to just right. After all, the first color version is the foundation. Therefore, the yellow ink printing is particularly important.

One, why the yellow color often as the first

Generally used in color printing yellow ink the pigment is an inorganic chromate pigments are divided into lemon yellow, light yellow, medium yellow, dark yellow, orange, etc. 5, accounting for 5.6 to 6, with oil small, heavy, rough, strong hiding characteristics. Often as the first yellow ink color printing, mainly for the following considerations.

1, transparency and print from ink color sequence of relations, the general, should be strong hiding power differential that is transparent printing ink on the back. As the yellow ink opacity, if it overlay the other ink on the printed matter will lack luster. Such as: the first color print yellow ink, the second magenta ink color printing, printed in red so good effect; the contrary, the first Indian red ink, and then trapping with yellow ink, printing out the red effect on the poor.

Course, with the continuous improvement of the printing ink, yellow ink is also increasing transparency in order to offset domestic light quick-drying inks, for example, the transparency of the better, if the use of high quality transparent overlay of ink times the color sequence, the effect is also possible. In fact, many manufacturers have chosen this color sequence.

2, the first yellow ink color printing can play fill the role of a rough surface of paper, but also because of its oil-less, easy to overlay up the next color ink.

3, the depth of ink level from the point of view, in a dark light on the overlay, overprint trace if allowed, is not very conspicuous. In contrast, in dark colors on light-colored overlay, overprint if allowed, will be exposed.

Red version so stacked yellow version, the overlay appears difficult to trace are not allowed to feel, but with a yellow version of stacked red version, if the overlay are not allowed, it is very easy to observe them.

Second yellow ink printing what issues should pay attention to

Lighter as yellow, his eyes are not sensitive to the printing, the ink on the yellow version of the size of the master and the fine-level control network than Indian red version, blue version is much more difficult. The following is printing yellow ink

need special attention to several aspects:

1, before the formal printing, plates should check the method is 5 to 10 times the magnifying glass to identify the depth of plate, to see whether the electrical outlets in four-color film of the same size network. Under normal circumstances, allow the plate than the electrical sub-network film slightly smaller, if the printed version of the network score bigger network color film, then drying out the plates that too. After checking the depth of plate, but also look at whether it is the quality of network requirements.

2, the yellow ink can be divided into three colors, namely: Shaodai blue light yellow ink, the yellow ink, Shaodai red dark yellow ink. As for the offset when the use is a yellow ink, according to the hue to be original. Yellow version in India, to estimate the changes to the ink itself, the change after drying, such as the neutral color yellow ink dries more easily flushed so. In the offset boot, according to the kind of proof ink monochrome.

3, check the yellow version of the printing process of ink, we should pay attention to the surrounding light. For example: orange yellow incandescent light, fluorescent light side a little blue-violet, in such a light color will occur under the observation of visual bias.

In addition, the yellow, they often use the blue glass. Because in the case of non-uniform light source, easy to judge is unclear, and blue

by: gaga

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