Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (05): 90-95.doi: 10.13475/j.fzxb.20200401007

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Study on color depth based on different formulas in Coloro color system

JIN Rui, ZHANG Yike, LI Rong()   

  1. College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
  • Received:2020-04-07 Revised:2021-04-17 Online:2021-05-15 Published:2021-05-20
  • Contact: LI Rong E-mail:lirong@dhu.edu.cn

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Abstract:

To promote the application of Coloro color system in color related industries, different color depth formulas were used to analyze the color depth, and the relationship between the color depth and lightness values were studied based on the 3 500 color cards of the Coloro color system. The Munsell color system was used to check the iso-depth of the color system; then the color depth level of the color cards were evaluated by using the Gall formula and the ISO color depth standard. The Integ formula and color value were used to analyze the color depth of Coloro color system. The results show that the Coloro color system offers good iso-depth. The results of the 1/1 levels in the Gall and ISO standards are similar, and each level has its corresponding lightness value distribution area. The color depth value of the Coloro color card reduces as the value of the lightness label increases by the Integ formula and the color value, which indicates that the above formulas are not applicable to the evaluation of color depth of Coloro color system.

Key words: Coloro color system, iso-depth, Coloro lightness, color depth formulas, color depth

CLC Number: 

  • TP19

Fig.1

Relationship between lightness label value of Coloro color system and VM. (a)Linear relationship between lightness label value of Coloro color card and converted VM; (b)Linear relationship between the VM of some cards and their theoretical VM"

Fig.2

CV value of color depth of each isobaric color card"

Fig.3

Distribution of evaluating color depth of Coloro color card by using Gall's formula"

Tab.1

Statistical data for evaluating color depth of Coloro color cards using Gall's formula"

等级 色卡总数 Coloro明度
标号平均值		 Coloro明度
标号众数		 Coloro明度
标号中位数
1/1 848 36 27 32
1/3 841 46 36 43
1/9 624 58 55 55
1/25 1 009 74 75 75

Fig.4

Distribution of Coloro lightness corresponding to 1/1 standard depth. (a)ISO standardization;(b)Gall's formula"

Tab.2

Statistics of Coloro color depth grades for two evaluation standardizations"

评价标准 色卡总数 Coloro明度
标号平均值		 Coloro明度
标号众数		 Coloro明度
标号中位数
Gall公式 848 36 27 32
ISO标准 90 33 27 30

Fig.5

Curves of color depth value calculated by 4 formulas as a function of Coloro lightness label value. (a)Integ value formula;(b)A value formula;(c)S value formula;(d)W value formula"

Fig.6

CV value of color depth of color cards with same Coloro lightness label"

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