How to accurately prepare spot color ink

The spot color ink formulation includes light color ink formulation and dark color ink formulation. All the inks prepared by adding the diluent to the original ink are light-colored inks. When mixing, the diluent is mainly used, and the primary color ink is supplemented. Please note:

1) Select the appropriate diluent according to the color sample;

2) Determine the ratio between the original ink and the diluent according to the chromatogram and the original sample;

3) Add the selected primary color inks in order from light to dark;

4) Add inks in order from the largest to the smallest in accordance with the proportion of blending;

5) After the preparation is even, use a spatula to take a small color sample and compare it with the original sample, or open the ink on the paper (that is, dip the ink with the volume similar to that of mung bean and place it on the paper, and then cover with another sheet of paper The ink is compared above);

6) Try not to use inks of different colors as much as possible, otherwise the gloss of the prepared ink will decrease and the ink color will be dark;

7) All papers of the sample should be the same as the printing paper. Observing the color draft and the sample must be performed under the same standard light source.

The preparation method of dark ink is basically the same as that of light ink, but please note:

1) Main ink is the main ink, supplemented by other inks. When blending, first analyze the light and dark relationship between the primary color ink and the secondary color ink, then weigh the ink, place the primary color ink on the ink table, slowly add the secondary color ink and stir evenly, and then observe the difference from the original color sample by comparison Until it matches.

2) Select the ink with the hue close to the requirement to carry out the ink. According to the principle of subtractive color, the mixed color will become dull. The more the number of primary color inks, the darker the color, and the lower the brightness and vividness of the color. Therefore, when mixing inks, you must choose color inks that are similar to the color requirements to avoid the deployment of multiple color inks. For example, dark brown is generally blended with red ink and yellow ink with slightly black ink.

3) Pay attention to the color shift of the ink. Ink usually has a slight color cast, such as reddish, blued, yellowish, etc. When distributing ink, it is necessary to control the color cast of each color ink.

Problems that should be paid attention to when mixing various inks

When blending spot color inks, in addition to operating rules, the following points must also be noted:

1) Ink-dispensing tools such as ink knives, 欠 ǎê school? ⑻ 炱 擱 Throw τ stuffy? Drag and blow cherry blossoms? ⒈ 3 refers to delete arc? Work environment, develop good operating habits.

3) Keep the remaining ink sent back on the machine, and do not dry it and skin it for future use. It is best to pour some ink into the remaining ink, and then cover it with oil paper.

4) When viewing the hue with paper twist, use the paper to be printed on to view under standard light source or natural light.

5) When mixing ink, do not use an ink knife with colored ink to dig up another color of ink or auxiliary materials.

6) When using ink in barrels or boxes, do not use an ink knife to dig randomly, but dig in layers on the surface.

7) Do not blindly add other auxiliary materials in the ink.

8) For inks with larger dosage, the desiccant is best used now and added as much as possible to ensure quality.

9) Promptly record the proportion of the ink to be mixed in order to facilitate the deployment of the ink in the next printing.

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