5:15 PM - 7:15 PM
[HRE13-P01] Created of new color chart for geological survey: color description based on Japanese Industrial Standards
Keywords:color description, Japanese Industrial Standards, Munsell color system
1. Background
Color description is one of the basic items in geological surveys, and has become one of the elements to distinguish rock types, weathering alteration, and hydrothermal alteration. However, there are the following problems with color description in actual geological surveys.
- Since the descriptions are written by each geologist based on their own eyeballs without using color charts or other tools, there is variation in the content written by each individual.
- Since a color chart from another fields (for example, STANDARD SOIL COLOR CHART) was used, it was difficult to deal with rocks that were outside the range.
2. Purpose
The purpose of this study is to solve the problems of color tone recording in geological surveys and improve quality by creating a new color chart that can be used universally for geological surveys.
3. Creation method
The Munsell color system, which expresses colors using three attributes: Hue, Value, and Chroma, was used to represent colors. The color chip was created using 2194 colors in sRGB and printed using RGB printing.
The color names were converted from the systematic color names standardized in the color names of object colors (JIS Z 8102:2001) to the color names used in geological surveys, using the following rules.
- The 10 basic colors are “black, gray, white, red, orange, yellow, green, blue, purple, and brown.”
- Colors other than the basic colors are expressed as combinations of two basic colors, with the secondary color preceding the primary color.
- Adjectives such as “deep, pale, light, dark, dull” are used as necessary.
In addition, brown, which is not included in the JIS color system, was added based on the ISCC–NBS System of Color Designation by the National Bureau of Standards (now the National Institute of Standards and Technology) of the United States.
A color chart with 40 equal Hue surface and 9 equal Value surface was created to make it easy to use during geological surveys.
Color description is one of the basic items in geological surveys, and has become one of the elements to distinguish rock types, weathering alteration, and hydrothermal alteration. However, there are the following problems with color description in actual geological surveys.
- Since the descriptions are written by each geologist based on their own eyeballs without using color charts or other tools, there is variation in the content written by each individual.
- Since a color chart from another fields (for example, STANDARD SOIL COLOR CHART) was used, it was difficult to deal with rocks that were outside the range.
2. Purpose
The purpose of this study is to solve the problems of color tone recording in geological surveys and improve quality by creating a new color chart that can be used universally for geological surveys.
3. Creation method
The Munsell color system, which expresses colors using three attributes: Hue, Value, and Chroma, was used to represent colors. The color chip was created using 2194 colors in sRGB and printed using RGB printing.
The color names were converted from the systematic color names standardized in the color names of object colors (JIS Z 8102:2001) to the color names used in geological surveys, using the following rules.
- The 10 basic colors are “black, gray, white, red, orange, yellow, green, blue, purple, and brown.”
- Colors other than the basic colors are expressed as combinations of two basic colors, with the secondary color preceding the primary color.
- Adjectives such as “deep, pale, light, dark, dull” are used as necessary.
In addition, brown, which is not included in the JIS color system, was added based on the ISCC–NBS System of Color Designation by the National Bureau of Standards (now the National Institute of Standards and Technology) of the United States.
A color chart with 40 equal Hue surface and 9 equal Value surface was created to make it easy to use during geological surveys.