1, color consistency
An important way to ensure color consistency is to allow customers to observe color proofs and print proofs under standard lighting conditions and gain their approval. In order to reduce variations in color transfer and reproduction, the printing industry has developed standard color viewing conditions, both standard color observation cells (a light source control area with a fluctuating environment for viewing proofs or other prints).
This color observation pool has two key elements: one is illumination (color temperature is 5000K); the other is neutral gray ring (MunsellN8).
It is important to check the color on the observation cell, as the lighting conditions and ambient conditions we check for color can affect our perception of color. If there is no standard observation pool, then we can also watch the proofs in non-direct sunlight.
2, the impact of lighting
When we look at the color under different lighting conditions, the effect is different. Another achievement that we need to pay attention to when observing color is metamerism. The so-called "homologism" means that when two proofs are under a certain light source, the colors presented are opposite, while under another light source, the colors presented are different.
When observing color, it is very important to adhere to the fluctuations in lighting conditions. The reason why we choose a light source with a color temperature of 5000K is that the light source is a mixture of red light, green light and blue light, which provides a consistent observation environment.
3. The impact of the surrounding environment
Can we observe the surrounding environment when printing proofs can affect the color? The proximity color, that is, the color similar to the sample or sheet being observed, can affect people's perception of color.
This is the so-called "critical effect", which to some extent reflects the importance of using a neutral environment when observing proofs. It is understood that the use of standard gray paint (Munsell N8) in the surrounding environment can effectively reduce the influence of the adjacent colors that people receive when confirming the color.
4, paper
The subtractive method refers to a method of mixing colors into yellow, magenta, cyan, and black inks in a white environment (usually paper). In this color copying process, there is an element that has a serious effect on the color printing effect of the machine, that is, paper.
The same ink color may produce different printing effects on different papers. The whiter the paper, the larger the color gamut that can be reproduced on the press. If the paper's Baidu is not enough, then the color gamut it copies on the press is smaller.
5, spot color
Each spot color corresponds to a special ink (except yellow, magenta, cyan, and black) that requires printing through a separate printing unit on the press. There are many reasons why people use spot colors in prints. Highlighting a company's brand abstraction (such as Coca-Cola's Red or Ford's Blue) is one of them, so whether you can accurately copy a spot color, whether it is for customers or It is vital to the printing house.
Another reason may be the use of metallic inks. Metallic inks usually contain some metal particles and give the print a metallic luster. In addition, when the original design color requirements exceed the gamut range that can be achieved by Huang Pinqing, we can also use the spot color to supplement.
6, convert the color to CMYK
When we convert the color of an image from RGB to CMYK, there are usually two ways to generate halftone dots for black ink, one for under color removal (UCR) and the other for gray component replacement (GCR).
Which method you choose depends on how much of the yellow, black, black, and black inks that will be printed in the image. "Bottom color removal" refers to the removal of a part of the neutral ash from the yellow, yellow and blue primary colors, that is, the approximate black color of the three primary colors of yellow, yellow and blue, and replaced by black ink. . The background color removal will affect the shadow area of ​​the image, not the color area. When the image is processed by the method of removing the under color, it is easy to have a color cast during the printing process.
The gray component substitution is similar to the background color removal, and the black ink is used instead of the gray of the color ink overprint, but the difference is that the gray component substitution means that the gray component in the entire tone range can be replaced with black. Therefore, when the gray component is substituted, the amount of black ink is small, and the image is printed by the color ink. When the maximum replacement amount is used, the amount of black ink is the largest, and the amount of color ink is correspondingly reduced. Images processed with the ash component replacement process fluctuate more during the printing process, but its effectiveness depends to a large extent on the ability of the printer operator to adjust the color.
7, technical terms
The reason we think color is difficult to describe, the second is because it is a feeling, like smell, taste and hearing, this feeling can not be described in words. When we have to use words to describe color, we often use vague words such as "flat", "turbid", "too warm" or "too cold".
For example, what is the image too warm? Is it color red, yellow or magenta? What is the meaning of "too cold"? Is the color of the image too blue, too green or too green? We say that the image is too "flat" usually means that its contrast is not enough, and the "turbidity" is that the color of the image is too dark. The use of non-standard terms extends the proofing cycle and delays the production of the job. Therefore, we must use terminology when talking about color - this can save you a lot of time and money.
8. Printing is not a process of “complete marriageâ€
What is copying? Copying is not a complete match, but infinite proximity. Printing is not a complete process of marriage, this time due to the color reproduction process in the color reproduction process.
Photography is a typical color reproduction system, as well as proofing and printing. When we compare what we see with our eyes with what the camera can capture and what the printer can replicate, the color gamut (or the number of colors that can be copied) becomes smaller.
1, color consistency
An important way to ensure color consistency is to allow customers to observe color proofs and print proofs under standard lighting conditions and gain their approval. In order to reduce variations in color transfer and reproduction, the printing industry has developed standard color viewing conditions, both standard color observation cells (a light source control area with a fluctuating environment for viewing proofs or other prints).
This color observation pool has two key elements: one is illumination (color temperature is 5000K); the other is neutral gray ring (MunsellN8).
It is important to check the color on the observation cell, as the lighting conditions and ambient conditions we check for color can affect our perception of color. If there is no standard observation pool, then we can also watch the proofs in non-direct sunlight.
2, the impact of lighting
When we look at the color under different lighting conditions, the effect is different. Another achievement that we need to pay attention to when observing color is metamerism. The so-called "homologism" means that when two proofs are under a certain light source, the colors presented are opposite, while under another light source, the colors presented are different.
When observing color, it is very important to adhere to the fluctuations in lighting conditions. The reason why we choose a light source with a color temperature of 5000K is that the light source is a mixture of red light, green light and blue light, which provides a consistent observation environment.
3. The impact of the surrounding environment
Can we observe the surrounding environment when printing proofs can affect the color? The proximity color, that is, the color similar to the sample or sheet being observed, can affect people's perception of color.
This is the so-called "critical effect", which to some extent reflects the importance of using a neutral environment when observing proofs. It is understood that the use of standard gray paint (Munsell N8) in the surrounding environment can effectively reduce the influence of the adjacent colors that people receive when confirming the color.
4, paper
The subtractive method refers to a method of mixing colors into yellow, magenta, cyan, and black inks in a white environment (usually paper). In this color copying process, there is an element that has a serious effect on the color printing effect of the machine, that is, paper.
The same ink color may produce different printing effects on different papers. The whiter the paper, the larger the color gamut that can be reproduced on the press. If the paper's Baidu is not enough, then the color gamut it copies on the press is smaller.
5, spot color
Each spot color corresponds to a special ink (except yellow, magenta, cyan, and black) that requires printing through a separate printing unit on the press. There are many reasons why people use spot colors in prints. Highlighting a company's brand abstraction (such as Coca-Cola's Red or Ford's Blue) is one of them, so whether you can accurately copy a spot color, whether it is for customers or It is vital to the printing house.
Another reason may be the use of metallic inks. Metallic inks usually contain some metal particles and give the print a metallic luster. In addition, when the original design color requirements exceed the gamut range that can be achieved by Huang Pinqing, we can also use the spot color to supplement.
6, convert the color to CMYK
When we convert the color of an image from RGB to CMYK, there are usually two ways to generate halftone dots for black ink, one for under color removal (UCR) and the other for gray component replacement (GCR).
Which method you choose depends on how much of the yellow, black, black, and black inks that will be printed in the image. "Bottom color removal" refers to the removal of a part of the neutral ash from the yellow, yellow and blue primary colors, that is, the approximate black color of the three primary colors of yellow, yellow and blue, and replaced by black ink. . The background color removal will affect the shadow area of ​​the image, not the color area. When the image is processed by the method of removing the under color, it is easy to have a color cast during the printing process.
The gray component substitution is similar to the background color removal, and the black ink is used instead of the gray of the color ink overprint, but the difference is that the gray component substitution means that the gray component in the entire tone range can be replaced with black. Therefore, when the gray component is substituted, the amount of black ink is small, and the image is printed by the color ink. When the maximum replacement amount is used, the amount of black ink is the largest, and the amount of color ink is correspondingly reduced. Images processed with the ash component replacement process fluctuate more during the printing process, but its effectiveness depends to a large extent on the ability of the printer operator to adjust the color.
7, technical terms
The reason we think color is difficult to describe, the second is because it is a feeling, like smell, taste and hearing, this feeling can not be described in words. When we have to use words to describe color, we often use vague words such as "flat", "turbid", "too warm" or "too cold".
For example, what is the image too warm? Is it color red, yellow or magenta? What is the meaning of "too cold"? Is the color of the image too blue, too green or too green? We say that the image is too "flat" usually means that its contrast is not enough, and the "turbidity" is that the color of the image is too dark. The use of non-standard terms extends the proofing cycle and delays the production of the job. Therefore, we must use terminology when talking about color - this can save you a lot of time and money.
8. Printing is not a process of “complete marriageâ€
What is copying? Copying is not a complete match, but infinite proximity. Printing is not a complete process of marriage, this time due to the color reproduction process in the color reproduction process.
Photography is a typical color reproduction system, as well as proofing and printing. When we compare what we see with our eyes with what the camera can capture and what the printer can replicate, the color gamut (or the number of colors that can be copied) becomes smaller.
Article source address: http://
NINGBO HOZ TRADING CO.,LTD , https://www.hoz-kitchenware.com