1. What is spot color ink

2. How to mix spot color offset ink

3. Spot color ink mixing How much do you know about skills

4. How to make a good gravure spot color ink preparation plan

5. How to prepare offset printing spot color ink

6. What are the techniques for adjusting ink colors

7. How to adjust spot color ink for printing

8. How to match pink ink with pink ink? What is spot color ink

Preparation of spot color ink

In order to improve the design and quality level of packaging and decoration products, printing factories print trademarks, packaging and promotional materials for tobacco, wine, chemicals, medicines, daily necessities, etc. , spot color inks are often used to ensure the color consistency of printed products and meet customer requirements.

Spot color inks generally refer to various colored inks other than the series produced by ink manufacturers.

In order to mix special-angle inks skillfully and accurately, you must master certain knowledge of ink color science.

1 Basics of ink color mixing

1. Basic color ink

Basic color ink is divided into three categories according to different mixing methods: primary color ink, standard secondary color ink and standard multicolor inks.

Primary color ink: refers to the three primary color inks that cannot be mixed with other colors, such as yellow, magenta, and cyan ink.

Theoretically speaking, the three primary colors of ink can be mixed in different proportions and ways to produce various colors. However, in practice, no matter how they are mixed, pure ink color cannot be produced.

Therefore, in color printing, four colors of yellow, magenta, cyan and black inks are mostly used for overprinting.

The basic definition and characteristics of spot color ink are already answered above. I will add here: white ink and gold ink are both spot color inks.

They are all mixed according to a certain proportion. How to mix spot color offset ink?

Spot color ink mixing is referred to as color matching. There are three main color matching methods:

< p> Empirical color matching method, chromatographic color matching method and computer color matching method.

The empirical color matching method is to determine the ink composition and proportion of the color sample based on experience for color matching.

This method is still commonly used in printing factories.

The chromatographic color matching method is to determine the ink composition and ratio of the color sample through printing chromatography for color matching, and the color matching accuracy is greatly improved.

Printing chromatography is divided into special *** spectrum and dot chromatography, and there are general chromatography and internal special chromatography.

Special *** spectrum is a chromatogram printed by mixing several spot color inks in different proportions. The production cost is high and the price is relatively expensive.

Dot chromatography is a chromatogram printed using Y, M, C, and K four-color inks according to different dot area ratios.

Currently, the most commonly used chromatography is PANTONE chromatography.

To use PANTONE chromatographic color matching, you must use inks that comply with PANTONE color standards for color matching.

Printing factories can also make their own chromatograms specifically for their own color matching.

Computer color matching uses a photometer and a computer processing system to determine the ink composition and ratio of color samples for color matching, which greatly improves the accuracy of color matching. How much do you know about spot color ink mixing techniques?

Methods for mixing spot color inks

Copying of continuous tone originals must be done by dot combination.

For on-site originals, if you use the four-color dot combination method, it will be extremely difficult to copy, the copying effect will be poor, the colors will be blurry and unrealistic, and the hue will easily deviate. At this time, you need to prepare the originals according to the original. A variety of spot colors to match printing.

1. Preparation of dark ink

Only three primary colors or secondary color inks are used without any diluent for ink preparation, which is collectively referred to as the preparation of dark ink.

The preparation of dark ink has the following steps:

(1) According to the color rule of subtractive color method, compare the original color sample with the chromatogram, analyze and determine the color sample The proportional relationship between the content of the three primary colors determines the order of the main color and the auxiliary color.

(2) Use the same type of three primary color inks as backup. For fine products, you can use bright quick-drying inks, and for general products, you can use resin-based inks.

(3) After determining the mixing quantity, add ink in order from large to small according to the mixing ratio.

First weigh the main primary color with the most content, and then weigh the auxiliary color with less content. Then add the auxiliary color ink to the main color ink several times and mix evenly.

(4) The three primary colors are mixed in different proportions to create a series of hues of varying shades, such as brown, fake gold, red purple, bronze, and olive green. During the mixing process, attention must be paid to the accuracy of the hue. In addition, , it is necessary to master the amount of drying oil and use different drying oils according to different hues.

2. Preparation of light-color ink

Any ink preparation that uses diluent or white ink as the main component and dark ink as the supplement is collectively called light-color ink preparation.

When mixing, gradually add the dark ink of the required hue to an appropriate amount of diluent and mix evenly until it meets the color sample requirements.

The types of diluents include: white oil, Vili oil, diluent, gloss paste, white ink, etc. When preparing light-colored ink, three different preparation methods are commonly used:

The first one: the dilution and blending method based on Weili oil, white oil, dilution agent, etc.

The light-colored ink prepared by this method has a certain degree of transparency and no covering power, but the ink color is not bright. It is very suitable for overlapping overprinting of inks and plays a role in making up for the lack of main colors. It is generally used in the offset printing process. Light red, light blue, light gray ink, etc., to complement the tonal atmosphere and level of the magenta version, blue version, and black version.

The second type: achromatic blending method based on white ink.

The light-colored ink prepared by this method has a pinkish tone and bright ink color, but has strong hiding power. Due to the heavy texture of the pigment, it is easy to pile up plates and blankets during printing, and has poor light resistance. Suitable for printing.

It is best not to use alkaline zinc oxide white ink.

The third method is to mix white oil, Vili oil, etc. with white ink.

In this method, the white ink plays a role in improving the color. The prepared light ink has different hiding power and transparency according to the amount of white ink used.

The hue of the ink prepared by different methods depends on the hue of the mixed ink on the one hand and the dilution method on the other hand.

For example:

Light red is mainly made of Weili oil, lightening agent, etc., with a little pink or orange added.

Pink is mainly white ink, with a little pink or orange.

The light blue color is mainly Vitiligo oil, etc., with a slight addition of peacock orchid.

Lake blue is mainly white ink, with a little peacock orchid added.

Although the above four types of light red, light blue, pink and lake blue are mixed with equal amounts of the same dark ink, their hues are different.

Light red and light blue are dull and dim in color; pink and lake blue are bright, beautiful and bright. How to make a good gravure spot color ink preparation plan

How to make a gravure spot color ink preparation plan

Gravure ink is also called gravure liquid ink. A stable colored colloidal dispersion system that can be coated on an appropriate substrate using an appropriate printing method to present text patterns and colors and provide information and attraction.

Like other printing inks, the main components of gravure ink are colored substances (pigments) and binders.

Among them, the colored substance plays a color development role and forms an image on the substrate by contrasting with the color of the substrate.

Only when the proportions of the various components of the ink are well blended can the ink be able to achieve its proper printability and usability, and achieve good coordination between the printing ink and the printing plate, printing machine, and printing materials. Make the printing process go smoothly.

Most gravure printing inks are volatile solvent-based inks, which are composed of pigments, solid resins, volatile solvents, fillers and additives.

The performance of gravure ink must first meet the needs of the gravure printing process. Secondly, the film layer where the ink is transferred to paper or other materials must be able to withstand subsequent processes and various uses during the use of the printed product. The role of conditions.

These properties include flow properties, optical properties, and resistance properties.

How to mix offset printing spot color ink

1. Dark spot color ink mixing

The color matching method that only uses primary color ink or secondary color ink without adding diluent is called dark color ink. Spot color ink blending.

For example: dark brown ink can generally be mixed with red ink, yellow ink, and black ink. When mixing colors, you can first analyze the color sample, select a sufficient main color, and then gradually add secondary colors and Add the auxiliary color and blend until you get the desired ink color.

2. Preparation of light spot color ink

Add diluent or white ink to primary color ink or secondary color ink to formulate light spot color ink.

For example: to mix pink spot color ink, you can first select a sufficient amount of white ink or diluent, and then add red ink little by little based on the principle of small amounts and multiple times, mixing as you go, until until you get the desired ink color. What are the techniques for ink mixing?

You can only rely on the skills and experience accumulated by the operators over the years. It will take at least 8 to 10 years for a reliable spot color ink mixer to fully control the ink mixing. Changes in color over time.

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Traditional color matching:

Masters usually use past experience or professional identification to find out the approximate ink types, and some are more specific. Just rely on personal feeling to take out the amount, then use an electronic scale to measure the required amount, and put the ink on the palette to mix.

After mixing is completed, take out a small amount and use a scraper to scrape the ribbon on the substrate to check whether the color is correct.

When a color cast is found, add a small amount of ink for fine-tuning. After completion, carefully record the amount and type of ink used on the recording paper in preparation for preparing a large amount of spot color ink. How to adjust printing spot color ink

Preparing spot color ink requires methods and principles. For spot color ink, you first need to check the amount. If the amount is large, just ask the ink supplier to help you. Once you get it, you can use it yourself. The quality is guaranteed and it is easy to use. If the quantity is not large, you have to mix it yourself. Generally, it is mixed by an experienced master. However, no matter who mixes it, The basic principles still need to be paid attention to. First, light first and then darken, and gradually blend in. Second, the fewer colors, the better. This makes it easier to control quality and avoid color difference. Third, keep good records of which colors match which colors, and each color. What are the proportions? Fourth, try to use new ink for blending. Fifth, choose inks from manufacturers with stable quality for blending. Don’t be greedy for cheap. Otherwise, it will not be cost-effective if color difference failures often occur, and you will lose a lot of money. Sixth, the final The adjustment result will be subject to actual machine proofing and the customer has approved and signed the sample. How to match pink ink

1. Ink (printing ink) is an important material used for printing. It expresses patterns and text on the substrate through printing or inkjet printing. The ink includes main components and auxiliary components, which are uniformly mixed and rolled repeatedly to form a viscous colloidal fluid. It consists of binder (resin), pigments, fillers, additives and solvents. Used for various printings such as books and periodicals, packaging and decoration, architectural decoration and electronic circuit boards;

2. Plum red and diluent can be used to make pink. The specific need is to be determined according to the depth of the pink.