Ink preparation refers to the process of mixing one or more inks together and adding certain auxiliary rib materials to adapt it to printing needs. The ink preparation mainly includes two aspects: on the one hand, it refers to the color adjustment of the ink, and on the other hand, it refers to the adjustment of the ink printing suitability. An important criterion for measuring the quality of printing is: the color must meet the requirements of the original. For the innumerable colors reflected in any color manuscript, the ink should be identified and recognized when the ink is prepared. This needs to be studied from the nature of color. As mentioned above, color has three characteristics, namely hue, brightness, and saturation, which are called the three attributes of color. The identification of any ink color can be distinguished according to the three attributes of color. Therefore, the theory of the three attributes of ink color is an important basis for the correct understanding and differentiation of various ink colors. . (1) Basic knowledge of ink preparation Ink preparation is a very detailed technical work, which should be carried out in a special room, mainly to grasp the hue and prevent sand and dust from falling into the ink. Equipment and reference material for ink preparation (1) Ink-adjusting worktable: a hard and smooth surface table (or slate) can be used as a worktable. In addition to the recipe, the ink samples and the printed samples should be saved. The surroundings of the room should be kept clean and tidy, and the walls must not have other bright colors with large areas. Because the environmental color has a great influence on the correct color discrimination. This phenomenon is called color illusion, and it is also a gray color block, which is reddish in a green environment and blued in a red environment. The same piece of color, surrounded by dark colors, it appears light. There are light colors around it, it looks darker. Therefore, when arranging inks, whether you are looking at the color samples of the original or the ink samples after ink adjustment, you must avoid the influence of the environmental color. (2) Method of mixing spot color ink For the duplication of continuous adjustment originals, it must be obtained by combining dots. For field manuscripts, if the four-color dot combination method is used, the copying is extremely difficult, the copying effect is not good, the colors are blurry and unreal, and the hue is also easy to produce deviations. . 1. The deployment of dark ink Use only three primary colors or intermediate color primary inks without any diluent for ink preparation, collectively called dark ink preparation. The deployment of dark ink is equipped with the following steps: (1) According to the color forming rule of the subtractive color method of the color material, compare the original color sample with the chromatogram, analyze and determine the proportional relationship of the content of the three primary colors in the color sample, and discharge the order of the main color and the auxiliary color. (2) Use the same type of three primary inks as spares. For fine products, use bright light quick-drying inks; for general products, use resin inks. (3) After determining the amount of blending, then add the ink in order from the largest to the smallest in accordance with the proportion of blending. Weigh the main primary color with the most content first, then weigh the auxiliary color with less content, and then add the auxiliary color ink to the main color ink in several times, and mix it evenly. (4) Use the three primary colors to mix and match a series of shades of shades such as brown, fake gold, red purple, bronze, olive green, etc. During the preparation process, you must pay attention to the accurate hue. In addition, you must master the dry oil. Add volume and use different dry oil according to different hue. Table 2-2 Three primary colors ink color change rule table primary color Matching Additional color Hue Three primary colors Equal Black (approximate) Three primary colors Equal White ink in different proportions Different tone light gray tone Three primary colors different ratio Various colors of different colors Two primary colors Equal Standard Interval Two primary colors Black ink Intermediate colors of various hues any color Black ink The color hue becomes relatively dark any color White ink Relatively lower color saturation Table 2-3 Inter-color ink blending table Table 2-4 Compound color ink formulation table Table 2-5 Hue and color deviation of commonly used inks name Hue and color cast Jinhong Red to yellow Scarlet Bright red, slightly yellow Crimson Dark red, slightly purple pink Magenta, slightly reddish Dark yellow Reddish yellow Medium Yellow Yellow with reddish flavor Light yellow Light yellow Navy Dark blue, gray In blue Slightly dark blue Peacock blue Cyan, slightly green Sky blue Cyan, slightly bluish Light Blue Dark blue to purple, reflecting red light 2. The deployment of light-colored ink Anything based on diluent or white ink, supplemented by dark ink, is generally referred to as light-colored ink preparation. When blending, the dark ink of the desired hue is gradually added to the appropriate amount of diluent and blended evenly until it meets the color sample requirements. The types of diluting agents are: white oil, weili oil, desalting agent, brightening pulp, white ink, etc. When mixing light-colored inks, three different methods are commonly used: The first one: the dilute blending method mainly based on Weili oil, white oil, desalting agent and so on. The light color ink prepared by this method has a certain degree of transparency and no hiding power, but the color of the ink is not clear. It is very suitable for overlapping overprinting of ink and plays a role in making up for the lack of main color. It is generally used for light red, light blue, Light gray ink, etc., to supplement the magenta, blue, black version of the tone atmosphere and layer. The second method: the whitening-based color matching method. The light color ink prepared by this method has pinkish color and fresh ink color, but has strong hiding power. Due to the heavy texture of the pigment, it is easy to stack plates, stack blankets during printing, and has poor light resistance. It is suitable for printing on the ground. It is better not to use alkaline zinc oxide white ink. The third type: the blending method of adding white ink with white oil and velvet oil. In this method, the white ink plays the role of color enhancement, and the prepared light-colored ink has different hiding power and transparency according to the different amounts of white ink. The hue of inks prepared by different methods depends on the hue of the ink blended on the one hand, and the diluting method on the other hand. E.g: Although the above four kinds of light red and light blue, pink and lake orchid are mixed with the same amount of dark ink, their hue is different. Light red, light blue dull, dull color; pink, lake blue are bright, beautiful and bright. Table 2-6 Reference Table for Light Color Ink Blending Light ink hue Main diluent (or white ink) Dark ink Pink White ink Pink or orange Lake Blue White ink Peacock blue (slightly sky blue if needed) Light red Weili oil, desalting agent Pink or orange Light blue Weili Oil Peacock blue Pale white White ink Pink, sky blue Lake Green White ink Light blue, light blue (deeper, slightly yellowish) Emerald green Desalting agent Peacock blue, medium yellow silver gray White oil, desalting agent, white ink Silver paste Sometimes, in actual production, the customer only provides the color name, and the color name is still a foreign name. The color spectrum has only the proportion of the color, and there is no color name, which often brings some difficulties to the ink adjustment work. This requires the ink adjustment worker to Summarize in practice, for example: Christmas red → yellow 100%, red 100% When mixing light-colored ink according to the corresponding proportion of each color dot of the color spectrum, you can refer to the following formula to calculate the approximate proportion of dilution required. Example 1: Light green on the chromatogram (yellow 50%, cyan 30%) Assuming that the required diluent is X, then Light green = yellow 50% + blue 30% + X Example 2: Light brown on the chromatography (yellow 30%, magenta 20%, cyan 20%) Assuming that the required diluent is X, then Light brown = yellow 30% + magenta 20% + cyan 20% + X [Expert Tips] In the preparation of light-colored inks, white ink should be used as little as possible, but it is not to say that white ink is not used. Although the white ink cannot be completely used as a diluent. But white ink does have a dilute effect on deep ink. In recent years, due to the trendy design, the colors have become more abundant, and the light colors formulated with white ink are indeed beautiful and bright, with bright colors. In addition, white ink is easy to accumulate ink during printing, and its transferability is poor, but it cannot be used to exclude the use of white ink. The most important thing is to respect the opinions of customers. Pet Wipes For Dogs,Long Hair Dog Brush,Dog Hair Shedding Brush,Professional Dog Nail Clippers Yangzhou Eco Pi international trading Co.,Ltd , https://www.eco-pi.com
(2) Ink adjustment knife: Two ink adjustment knives (preferably one wide and one narrow) can be adjusted evenly.
(3) Bench scale, scraper, scraping paper, and ink tray box.
(4) Recipe record should record the proportion of each component and multiple additives each time (5) Color table (spectrum)
The light red is mainly composed of Weili oil, desalting agent, etc., and slightly pink or orange.
Pink is dominated by white ink, slightly pink or orange.
The light blue is mainly made of Weili oil, with a little peacock orchid.
Lake blue is dominated by white ink and slightly peacock orchid.
Coral red → yellow 50%, red 70%
Bellflower Color → Magenta 70%, Cyan 70%
Turkish blue → yellow 20%, green 80%
If the color → yellow 80%, green 10%
Naples Yellow → Yellow 70%, Magenta 10%
Almond yellow → yellow 50%, magenta 30%
Amber → yellow 80%, magenta 50%
Royal Purple → Yellow 30%, Magenta 100%, Cyan 80%
Navy blue → Magenta 90%, Cyan 100%, 50%
Olive → Yellow 90%, Magenta 30%, Black 80%
Mustard color → yellow 100%, magenta 10%, black 30%
Prussian Blue → Yellow 40%, Magenta 70%, Cyan 100%
Wool color → yellow 30%, magenta 20%, cyan 20%
Bottle Green → Yellow 60%, Magenta 50%, Cyan 90%
X = (100-50) + (100-30) = 50 + 70 = 120
The actual ratio is: yellow ink: green ink: diluent = 5: 3: 12
That is, 12 parts of diluent is needed when preparing the light green ink.
X = (100-30) + (100-20) + (100-20) = 70 + 80 + 80 = 230
The actual ratio is: yellow ink: magenta ink: cyan ink: diluent = 3: 2: 2: 23
When the light brown ink is used, 23 parts of diluent are needed.
Method for preparing spot color ink
primary color
The mixing ratio
Hue
Medium Yellow
pink
Sky blue
50
50
0
1: 1: 0
Scarlet
75
25
0
3: 1: 0
Dark yellow
25
75
0
1: 3: 0
Jinhong
50
0
50
1: 0: 1
green
75
0
25
3: 0: 1
Emerald green
80
0
20
4: 0: 1
Apple green
0
50
50
0: 1: 1
Blue-violet
25
0
75
1: 0: 3
Dark green
0
75
25
0: 3: 1
Qinglian
0
25
75
0: 1: 3
Navy purple
primary color
The mixing ratio
Hue
Medium Yellow
pink
Sky blue
25
50
25
1: 2: 1
Full red
25
100
25
1: 4: 1
Red heald
25
25
50
1: 1: 2
Olives
25
25
100
1: 1: 4
Dark green
33
33
33
1: 1: 1
black