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
紡織品顏色表示方法
1 范圍
本文件規定了紡織品顏色的色立體、標號、測量和色差評價。
本文件適用于紡織品顏色的表示,與紡織品相關的其他行業表示顏色時可參照使用。
2 規范性引用文件
下列文件中的內容通過文中的規范性引用而構成本文件必不可少的條款。其中,注日期的引用文件,僅該日期對應的版本適用于本文件;不注日期的引用文件,其最新版本(包括所有的修改單)適用于本文件。
GB/T 3977 顏色的表示方法
GB/T 3978 標準照明體和幾何條件
GB/T 3979 物體色的測量方法
GB/T 5698 顏色術語
GB/T 6529 紡織品 調濕和試驗用標準大氣
GB/T 7771 特殊同色異譜指數的測定 改變照明體
GB/T 8424.3 紡織品 色牢度試驗 色差的計算
GB/T 9340 熒光樣品顏色的測量方法
GB/T 15610 同色異譜的目視評價方法
ISO 23603 Standard method of assessing the spectral quality of daylight simulators for visual appraisal and measurement of colour
CIE 015 色度學(Colorimetry)
3 術語和定義
GB/T 5698界定的以及下列術語和定義適用于本文件。
3.1
色相hue
H
顏色視覺三屬性之- - ,表示紅、黃、綠、藍、紫等特性。
3.2
明度value
V
顏色視覺三屬性之--,表示物體表面顏色明暗程度的特性,在理想黑和理想白之間給予分度。
3.3
彩度chroma
C
顏色視覺三屬性之一,表示物體表面顏色灰艷程度的特性,用與等明度無彩色之間的差別表示。
[來源:GB/T 5698-2001, 5.9,有修改]
3.4
特殊同色異譜指數 special metamerism index
M[CIE]
同色異譜刺激在參照的照明體、觀察者和幾何條件下等色時,將參照的照明體改為其他照明體或模擬光源,或將參照的觀察者改為其他測試觀察者,引起的色差。
注:分析物體色同色異譜時,參照照明體D65改為其他測試照明體t,符號為Mt,ilm;分析模擬光源的光譜質量時,可見光部分符號為Mv ,紫外部分符號為Mu;分析觀察者變化時,符號為Mobs.
[來源:CIE 015:2018, 9.1,有修改]
4 色立體
4.1 組成
顏色由無彩色系和有彩色系組成柱坐標系,以自下而上、由黑到白的中豎軸為明度軸,以與中豎軸垂直的距離為彩度值,以繞中豎軸的俯視轉角為色相轉角,由色相、明度、彩度三屬性構成色立體。
