Method of specification for textile colors
1 Scope
This document specifies the color solid, notation, measurement and color difference assessment of textile colors.
This document is applicable to the specification for textile colors, and may be used as reference for color specification in other industries related to textiles.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 3977 Specification of colors
GB/T 3978 Standard illuminants and geometric conditions
GB/T 3979 Methods for the measurement of object color
GB/T 5698 Glossary of color terms
GB/T 6529 Textiles - Standard atmospheres for conditioning and testing
GB/T 7771 Measurement of special metamerism index - Change in illuminant
GB/T 8424.3 Textiles - Tests for colour fastness - Calculation of colour differences
GB/T 9340 Methods for color measurement of fluorescent specimens
GB/T 15610 Method for visual appraisal of metamerism
ISO 23603 Standard method of assessing the spectral quality of daylight simulators for visual appraisal and measurement of colour
CIE 015 Colorimetry
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 5698 and the following apply.
3.1
hue
H
one of the three visual attributes of colors, which indicates the characteristics of red, yellow, green, blue, purple, etc.
3.2
value
V
one of the three visual attributes of colors, which indicates the brightness of color on the surface of an object, and divided between ideal black and ideal white
3.3
chroma
C
one of the three visual attributes of colors, which indicates the grayness of color on the surface of an object, and is represented by the difference from the achromatic color with equal value
[Source: GB/T 5698-2001, 5.9, modified]
3.4
special metamerism index
M [CIE]
color difference caused by changing the reference illuminant into other illuminants or simulated light sources, or changing the reference observer into other observers when the metameric color stimuli are isochromatic under the reference illuminant, observer and geometric conditions
Note: When analyzing the color metamerism of objects, the reference illuminant D65 is changed to other test illuminant t, and the special metamerism index is represented by Mt,ilm; when analyzing the spectral quality of simulated light source, the special metamerism index of visible light part is represented by Mv, and that of ultraviolet part is represented by Mu; when analyzing the observer changes, the special metamerism index is represented by Mobs.
[Source: CIE 015:2018, 9.1, modified]
4 Color solid
4.1 Composition
The cylindrical coordinate system of color consists of achromatic system and chromatic system, with the middle vertical axis from bottom to top and from black to white as the value axis, the distance perpendicular to the middle vertical axis as the chroma, and the top angle around the middle vertical axis as the hue angle. The color solid is composed of three attributes: hue, value and chroma.
Contents
1 Scope
2 Normative references
3 Terms and definitions
4 Color solid
5 Notations
6 Measurement and color difference assessment
Annex A (Normative) Relationship between value notation V and luminance factor Y10
Annex B (Normative) Color data values corresponding to partial notations of textile colors
纺织品颜色表示方法
1 范围
本文件规定了纺织品颜色的色立体、标号、测量和色差评价。
本文件适用于纺织品颜色的表示,与纺织品相关的其他行业表示颜色时可参照使用。
2 规范性引用文件
下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中,注日期的引用文件,仅该日期对应的版本适用于本文件;不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。
GB/T 3977 颜色的表示方法
GB/T 3978 标准照明体和几何条件
GB/T 3979 物体色的测量方法
GB/T 5698 颜色术语
GB/T 6529 纺织品 调湿和试验用标准大气
GB/T 7771 特殊同色异谱指数的测定 改变照明体
GB/T 8424.3 纺织品 色牢度试验 色差的计算
GB/T 9340 荧光样品颜色的测量方法
GB/T 15610 同色异谱的目视评价方法
ISO 23603 Standard method of assessing the spectral quality of daylight simulators for visual appraisal and measurement of colour
CIE 015 色度学(Colorimetry)
3 术语和定义
GB/T 5698界定的以及下列术语和定义适用于本文件。
3.1
色相hue
H
颜色视觉三属性之- - ,表示红、黄、绿、蓝、紫等特性。
3.2
明度value
V
颜色视觉三属性之--,表示物体表面颜色明暗程度的特性,在理想黑和理想白之间给予分度。
3.3
彩度chroma
C
颜色视觉三属性之一,表示物体表面颜色灰艳程度的特性,用与等明度无彩色之间的差别表示。
[来源:GB/T 5698-2001, 5.9,有修改]
3.4
特殊同色异谱指数 special metamerism index
M[CIE]
同色异谱刺激在参照的照明体、观察者和几何条件下等色时,将参照的照明体改为其他照明体或模拟光源,或将参照的观察者改为其他测试观察者,引起的色差。
注:分析物体色同色异谱时,参照照明体D65改为其他测试照明体t,符号为Mt,ilm;分析模拟光源的光谱质量时,可见光部分符号为Mv ,紫外部分符号为Mu;分析观察者变化时,符号为Mobs.
[来源:CIE 015:2018, 9.1,有修改]
4 色立体
4.1 组成
颜色由无彩色系和有彩色系组成柱坐标系,以自下而上、由黑到白的中竖轴为明度轴,以与中竖轴垂直的距离为彩度值,以绕中竖轴的俯视转角为色相转角,由色相、明度、彩度三属性构成色立体。
