The allocation of short-range printing spot color ink and the application of residual ink

In packaging and printing, there are many short editions with thousands of copies to 10,000 copies, and a considerable number of them are printed on the spot. When blending spot color inks, more adjustments result in waste; less adjustments require additional adjustments, which is not only time-consuming, but also difficult to ensure the consistency of the ink colors adjusted before and after, resulting in color deviation. Therefore, how to accurately control the amount of spot color ink is critical.

Determine the amount of ink adjustment according to the number of prints

Based on years of experience, I have come up with an empirical formula for controlling the amount of ink adjustment, which can help the ink adjuster to accurately control the amount of ink adjustment, and also provide a basis for the management personnel to manage the cost of materials. 1kg ink ≈ 1 refill of the paper full-field solid ink (positive split)

Involving other papers with different openings and solid plots with different areas can be converted according to the specific conditions of the printed matter according to the above formula. Note that when adjusting the ink, the amount of ink adjusted is 0.5 more than the conversion result. kg (such as printed version, 1kg ink can print about 16 reams of folio).

Ink residual ink treatment

For the residual ink treatment of spot color inks for short-run field printing, many manufacturers currently place them for a long period of time, so that they will accumulate dust and oxidize and deteriorate until they are scrapped. In fact, we may wish to adopt the following two methods.

First, when blending another batch of dark solid spot color inks, it is blended with the original spot color residual ink according to the difference of its components and hue, but the hue of the adjusted ink cannot be changed.

The second is to mix the remaining inks (commonly known as miscellaneous inks) stored for a long time according to the principle of the three primary colors of the ink color, and mix them into "black" inks. If the blackness is not enough, the primary color black ink can be added appropriately. The “black” ink transferred in this way can be used for book printing and general color printing on coated paper. As we all know, in four-color printing, the black version only plays a role of "outline" and "emphasis" on the mid-dark parts of the pattern, and will not affect the basic color of the pattern. However, because there are many "miscellaneous ink" ink skins, it will bring spots to the solid strips during the printing process, and the blackness of the "miscellaneous ink" is limited, which will make the solid strips appear grayish, so it cannot be used to print black solid areas. Striped pattern.

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