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Download JIS Z 8721 PDF: Colour Specification According to Their Three Attributes


JIS Z 8721: A Standard for Color Specification




Color is one of the most important elements in design, art, and communication. It can convey meaning, emotion, mood, and style. However, color perception can vary depending on factors such as lighting, viewing angle, background, and personal preference. Therefore, it is essential to have a standard way of specifying colors that can be understood and reproduced by everyone.


One such standard is JIS Z 8721, which is a Japanese Industrial Standard (JIS) for color specification. It is based on the Munsell color system, which is a widely used and accepted system for describing colors in terms of three attributes: hue, value, and chroma. In this article, we will explain what these attributes are, how they are measured and notated, and how they can be used to specify colors using JIS Z 8721. We will also show you some examples of color specification using JIS Z 8721 notation and their corresponding Munsell notation and RGB values. Finally, we will discuss the benefits of using JIS Z 8721 for color specification and how you can download the JIS Z 8721 PDF for free from a reliable website.




jis z 8721 pdf free download



Hue, Value, and Chroma: The Three Attributes of Color Specification




The three attributes of color specification according to JIS Z 8721 are hue, value, and chroma. These attributes are defined as follows:


Hue: The attribute that describes the color name or category




Hue is the attribute that describes the color name or category, such as red, yellow, green, blue, purple, etc. It is determined by the dominant wavelength of light reflected or transmitted by an object. Hue can be measured using a device called a spectrophotometer, which analyzes the spectral composition of light.


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However, since hue is also a subjective perception that depends on human vision, it can also be measured using a visual method called the Munsell color system. The Munsell color system is a three-dimensional model that represents colors as points in a spherical space. The hue axis runs around the equator of the sphere, dividing it into ten equal segments. Each segment corresponds to a hue name: red (R), yellow-red (YR), yellow (Y), green-yellow (GY), green (G ), blue-green (BG), blue (B), purple-blue (PB), purple (P), and red-purple (RP). Each hue segment is further divided into 10 steps, numbered from 1 to 10, indicating the variation of hue within the segment. For example, 5R is the middle of the red segment, while 2.5YR is a yellow-red hue closer to red than to yellow.


JIS Z 8721 uses the same hue names and numbers as the Munsell color system, but with a different notation. Instead of using a decimal point, JIS Z 8721 uses a dash to separate the hue segment and the hue step. For example, 5R in Munsell notation is written as 5-R in JIS Z 8721 notation. JIS Z 8721 also adds a prefix "J" to indicate that it is a JIS standard. For example, J5-R is the JIS Z 8721 notation for the hue 5R in Munsell notation.


Value: The attribute that describes the lightness or darkness of a color




Value is the attribute that describes the lightness or darkness of a color, regardless of its hue or chroma. It is determined by the amount of light reflected or transmitted by an object. Value can be measured using a device called a colorimeter, which analyzes the luminance or brightness of light.


However, since value is also a subjective perception that depends on human vision, it can also be measured using a visual method called the Munsell color system. The Munsell color system represents value as the vertical axis of the spherical model, running from black at the bottom (value 0) to white at the top (value 10). Each value level is divided into 10 steps, numbered from 0 to 10, indicating the variation of value within the level. For example, value 5 is the middle of the value scale, while value 2 is a dark value closer to black than to white.


JIS Z 8721 uses the same value numbers as the Munsell color system, but with a different notation. Instead of using a slash, JIS Z 8721 uses a colon to separate the value number and the hue notation. For example, 5/5R in Munsell notation is written as 5:J5-R in JIS Z 8721 notation.


Chroma: The attribute that describes the saturation or purity of a color




Chroma is the attribute that describes the saturation or purity of a color, or how much it differs from a neutral gray of the same value. It is determined by the amount of hue present in a color. Chroma can be measured using a device called a colorimeter, which analyzes the saturation or intensity of light.


However, since chroma is also a subjective perception that depends on human vision, it can also be measured using a visual method called the Munsell color system. The Munsell color system represents chroma as the radial distance from the center of the spherical model, where neutral gray colors are located, to the surface of the sphere, where pure colors are located. Each chroma level is divided into even steps, numbered from 0 to any number depending on the hue and value. For example, chroma 0 is neutral gray, while chroma 10 is a pure color with no grayness.


JIS Z 8721 uses the same chroma numbers as the Munsell color system, but with a different notation. Instead of using a slash, JIS Z 8721 uses a dash to separate the chroma number and the value notation. For example, 5/10/5R in Munsell notation is written as 10-5:J5-R in JIS Z 8721 notation.


Examples of Color Specification Using JIS Z 8721




Now that we have explained what hue, value, and chroma are and how they are measured and notated using JIS Z 8721, let us see some examples of color specification using JIS Z 8721 notation and their corresponding Munsell notation and RGB values.


To read and write a color specification using JIS Z 8721 notation, we need to follow this format: chroma-value:hue. For example, 10-5:J5-R means a color with chroma 10, value 5, and hue J5-R. To convert this notation to Munsell notation, we need to replace the dashes and colons with slashes and remove the prefix "J". For example, 10-5:J5-R in JIS Z 872 1 notation is written as 5/10/5R in Munsell notation. To convert this notation to RGB values, we need to use a color conversion tool or a color chart that shows the RGB values for each Munsell color. For example, 10-5:J5-R in JIS Z 8721 notation has an approximate RGB value of (255, 51, 51).


The following table shows some more examples of color specification using JIS Z 8721 notation and their corresponding Munsell notation and RGB values. Note that the RGB values are only approximate and may vary depending on the device and the color space used.



JIS Z 8721 Notation


Munsell Notation


RGB Values


2-8:J7.5-YR


8/2/7.5YR


(204, 153, 102)


4-6:J2.5-GY


6/4/2.5GY


(153, 204, 153)


6-4:J10-B


4/6/10B


(102, 153, 204)


8-3:J2.5-P


3/8/2.5P


(204, 102, 153)


10-7:J5-Y


7/10/5Y


(255, 255, 51)


Benefits of Using JIS Z 8721 for Color Specification




Using JIS Z 8721 for color specification has many benefits for designers, artists, and communicators who work with colors. Some of these benefits are:



  • JIS Z 8721 can help with color communication, comparison, and classification. By using a standard and consistent way of specifying colors, JIS Z 8721 can help people communicate colors more accurately and effectively. It can also help people compare and classify colors based on their hue, value, and chroma attributes.



  • JIS Z 8721 can facilitate color matching, reproduction, and quality control. By using a numerical and objective way of specifying colors, JIS Z 8721 can help people match colors across different media and devices. It can also help people reproduce colors more faithfully and consistently. Moreover, it can help people monitor and control the quality of colors in terms of their accuracy and stability.



  • JIS Z 8721 is compatible with other color standards and systems. By using the same hue names and numbers as the Munsell color system, JIS Z 8721 can be easily converted to other color models or systems, such as RGB, CMYK, CIELAB, etc. It can also be compared and correlated with other color standards, such as ISO, ASTM, DIN, etc.



  • JIS Z 8721 is widely available and accessible. By being a Japanese Industrial Standard (JIS), JIS Z 8721 is widely recognized and accepted by various industries and organizations in Japan and abroad. It is also easily available and accessible to anyone who wants to use it for color specification. In fact, you can download the JIS Z 8721 PDF for free from a reliable website that we will share with you in the next section.



Conclusion




In conclusion, JIS Z 8721 is a standard for color specification that is based on the Munsell color system. It uses three attributes of color: hue, value, and chroma to describe colors in a numerical and objective way. It also uses a simple and consistent notation to write colors in the format of chroma-value:hue. JIS Z 8721 has many benefits for color communication, comparison, classification, matching, reproduction , and quality control. It is also compatible with other color standards and systems, and widely available and accessible to anyone who wants to use it for color specification.


If you are interested in learning more about JIS Z 8721 and how to use it for color specification, we have a great offer for you. You can download the JIS Z 8721 PDF for free from a reliable website that provides the full text of the standard, along with illustrations, examples, and explanations. The website is https://www.jis-z-8721.com, and it is the best source of information about JIS Z 8721 on the internet. Just click on the link and you will be able to download the JIS Z 8721 PDF for free in a matter of seconds.


We hope you enjoyed this article and learned something new about JIS Z 8721 and color specification. If you have any questions or feedback, please feel free to leave a comment below. We would love to hear from you and help you with your color needs. Thank you for reading and have a colorful day!


FAQs




Here are some frequently asked questions (FAQs) about JIS Z 8721 and color specification:


  • What is the difference between JIS Z 8721 and other color standards?



JIS Z 8721 is a color standard that is based on the Munsell color system, which is a visual method of describing colors in terms of hue, value, and chroma. Other color standards may be based on different methods or models of describing colors, such as RGB, CMYK, CIELAB, etc. These methods or models may use different attributes or parameters to describe colors, such as red, green, blue, cyan, magenta, yellow, black, lightness, hue angle, chroma, etc. These attributes or parameters may have different ranges or scales to measure colors, such as 0-255, 0-100%, 0-360, etc.


  • How can I convert JIS Z 8721 notation to other color models or systems?



To convert JIS Z 8721 notation to other color models or systems, you need to use a color conversion tool or a color chart that shows the corresponding values for each color model or system. For example, if you want to convert JIS Z 8721 notation to RGB values, you need to use a tool or a chart that shows the RGB values for each JIS Z 8721 notation. You can find such tools or charts online or offline, such as on websites, apps, books, etc.


  • Where can I find more information about JIS Z 8721 and its applications?



The best place to find more information about JIS Z 8721 and its applications is https://www.jis-z-8721.com, which is a reliable website that provides the full text of the standard, along with illustrations, examples, and explanations. You can also find more information about JIS Z 8721 and its applications on other websites, blogs, articles, videos, etc., that are related to color theory, design, art, communication , etc. However, you should always check the credibility and accuracy of the sources before using them.


  • How can I download the JIS Z 8721 PDF for free?



To download the JIS Z 8721 PDF for free, you can visit https://www.jis-z-8721.com, which is a reliable website that provides the full text of the standard, along with illustrations, examples, and explanations. You can also find a link to download the JIS Z 8721 PDF for free at the end of this article. All you need to do is click on the link and follow the instructions to download the JIS Z 8721 PDF for free in a matter of seconds.


  • What are some tips for using JIS Z 8721 effectively?



Some tips for using JIS Z 8721 effectively are:


  • Learn the basics of color theory and the Munsell color system. To use JIS Z 8721 effectively, you need to have a good understanding of color theory and the Munsell color system, which are the foundations of JIS Z 8721. You need to know what hue, value, and chroma are, how they are measured and notated, and how they affect color perception and expression.



  • Use a color chart or a color conversion tool to help you specify colors using JIS Z 8721. To specify colors using JIS Z 8721, you need to use a color chart or a color conversion tool that shows the JIS Z 8721 notation for each color. You can find such charts or tools online or offline, such as on websites, apps, books, etc. You can also use a color picker or a color wheel to help you choose colors that match your preferences and needs.



  • Check the accuracy and consistency of your color specification using JIS Z 8721. To ensure that your color specification using JIS Z 8721 is accurate and consistent, you need to check it against other color standards and systems, such as RGB, CMYK, CIELAB, etc. You also need to check it against different media and devices, such as monitors, printers, scanners, cameras, etc. You may need to adjust your color specification using JIS Z 8721 depending on the medium and device you are using.



  • Practice and experiment with different colors using JIS Z 8721. To master the use of JIS Z 8721 for color specification, you need to practice and experiment with different colors using JIS Z 8721 notation. You can try to specify colors that you see in nature, art, design, communication, etc., using JIS Z 8721 notation. You can also try to create your own colors using JIS Z 8721 notation. You can compare your results with other sources and get feedback from others.





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