Publicado

2019-10-01

Impact of different standard lighting sources on red jadeite and color quality grading

Impacto por diferentes fuentes de iluminación estándar en la clasificación de jadeíta roja y la calidad del color

DOI:

https://doi.org/10.15446/esrj.v23n4.84113

Palabras clave:

jadeite, color-causing, standard light source, color, quality grading, (en)
jadeíta, causante de color, fuente de luz estándar, color, clasificación de calidad. (es)

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Autores/as

  • Xin Pan School of Gemology, China University of Geosciences (Beijing), Beijng, 100083 China
  • Ying Guo School of Gemology, China University of Geosciences (Beijing), Beijng, 100083 China
  • Ziyuan Liu School of Gemology, China University of Geosciences (Beijing), Beijng, 100083 China
  • Zikai Zhang School of Gemology, China University of Geosciences (Beijing), Beijng, 100083 China
  • Yuxiang Shi School of Gemology, China University of Geosciences (Beijing), Beijng, 100083 China

The purpose of this paper is to investigate the standard light source for grading and displaying the color of red jadeite and to classify the color. With Raman spectrometer, ultraviolet-visible spectrophotometer and X-ray fluorescence spectrometer, the results show that, the Fe 3+ is the main chromogenic mineral of red jadeite, which negatively correlates with the tonal angle, while the color of red jadeite has a positive correlation with the hematite content. The color of 120 red jadeite samples was examined by collecting the reflective signaled from the sample surface using an integrating sphere with the portable X-Rite SP62 spectrophotometer based on CIE 1976 L*a*b* uniform color space. The color parameters of jadeite samples under D65, A and CWF standard light sources were analyzed. The light spectrum of D65 light source is continuous, relatively smoothed with high color temperature, which makes the sample color close to that under the natural light and can be used as the best evaluation light source. A light source contributes to improve the red tone of jadeite, which is the best light source for commercial display of red jadeite. CWF light source can be used as the auxiliary lighting for color evaluation. The color of red jadeite is divided into five levels from best to worst using K-Means cluster analysis and Fisher discriminant analysis under D65 light source: Fancy Vivid, Fancy Deep, Fancy Intense, Fancy dark and Fancy.

El propósito de este trabajo es investigar la fuente de luz estándar para calificar y mostrar el color de jadeíta roja y clasificar el color. Con el espectrómetro Raman, el espectrofotómetro ultravioleta-visible y el espectrómetro de fluorescencia de rayos X, los resultados muestran que el Fe 3+ es el principal mineral cromogénico de la jadeíta roja, que se correlaciona negativamente con el ángulo tonal, mientras que el color de la jadeíta roja tiene una correlación positiva con el contenido de hematita. El color de 120 muestras de jadeíta roja se examinó recogiendo el reflectante señalado desde la superficie de la muestra utilizando una esfera de integración con el espectrofotómetro portátil X-Rite SP62 basado en espacio de color uniforme CIE 1976 L*a*b*. Se analizaron los parámetros de color de las muestras de jadeíta bajo las fuentes de luz estándar D65, A y CWF. El espectro de luz de la fuente de luz D65 es continuo, relativamente suavizado con alta temperatura de color, lo que hace que el color de la muestra sea similar al de la luz natural y puede usarse como la mejor fuente de luz de evaluación. Una fuente de luz contribuye a mejorar el tono rojo de jadeíta, que es la mejor fuente de luz para la exhibición comercial de jadeíta roja. La fuente de luz CWF se puede utilizar como iluminación auxiliar para la evaluación del color. El color de la jadeíta roja se divide en cinco niveles, de mejor a peor, utilizando el análisis de conglomerados K-Means y el análisis discriminante de Fisher bajo la fuente de luz D65: Fancy Vivid, Fancy Deep, Fancy Intense, Fancy dark y Fancy.

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Cómo citar

APA

Pan, X., Guo, Y., Liu, Z., Zhang, Z. y Shi, Y. (2019). Impact of different standard lighting sources on red jadeite and color quality grading. Earth Sciences Research Journal, 23(4), 371–378. https://doi.org/10.15446/esrj.v23n4.84113

ACM

[1]
Pan, X., Guo, Y., Liu, Z., Zhang, Z. y Shi, Y. 2019. Impact of different standard lighting sources on red jadeite and color quality grading. Earth Sciences Research Journal. 23, 4 (oct. 2019), 371–378. DOI:https://doi.org/10.15446/esrj.v23n4.84113.

ACS

(1)
Pan, X.; Guo, Y.; Liu, Z.; Zhang, Z.; Shi, Y. Impact of different standard lighting sources on red jadeite and color quality grading. Earth sci. res. j. 2019, 23, 371-378.

ABNT

PAN, X.; GUO, Y.; LIU, Z.; ZHANG, Z.; SHI, Y. Impact of different standard lighting sources on red jadeite and color quality grading. Earth Sciences Research Journal, [S. l.], v. 23, n. 4, p. 371–378, 2019. DOI: 10.15446/esrj.v23n4.84113. Disponível em: https://revistas.unal.edu.co/index.php/esrj/article/view/84113. Acesso em: 14 jul. 2024.

Chicago

Pan, Xin, Ying Guo, Ziyuan Liu, Zikai Zhang, y Yuxiang Shi. 2019. «Impact of different standard lighting sources on red jadeite and color quality grading». Earth Sciences Research Journal 23 (4):371-78. https://doi.org/10.15446/esrj.v23n4.84113.

Harvard

Pan, X., Guo, Y., Liu, Z., Zhang, Z. y Shi, Y. (2019) «Impact of different standard lighting sources on red jadeite and color quality grading», Earth Sciences Research Journal, 23(4), pp. 371–378. doi: 10.15446/esrj.v23n4.84113.

IEEE

[1]
X. Pan, Y. Guo, Z. Liu, Z. Zhang, y Y. Shi, «Impact of different standard lighting sources on red jadeite and color quality grading», Earth sci. res. j., vol. 23, n.º 4, pp. 371–378, oct. 2019.

MLA

Pan, X., Y. Guo, Z. Liu, Z. Zhang, y Y. Shi. «Impact of different standard lighting sources on red jadeite and color quality grading». Earth Sciences Research Journal, vol. 23, n.º 4, octubre de 2019, pp. 371-8, doi:10.15446/esrj.v23n4.84113.

Turabian

Pan, Xin, Ying Guo, Ziyuan Liu, Zikai Zhang, y Yuxiang Shi. «Impact of different standard lighting sources on red jadeite and color quality grading». Earth Sciences Research Journal 23, no. 4 (octubre 1, 2019): 371–378. Accedido julio 14, 2024. https://revistas.unal.edu.co/index.php/esrj/article/view/84113.

Vancouver

1.
Pan X, Guo Y, Liu Z, Zhang Z, Shi Y. Impact of different standard lighting sources on red jadeite and color quality grading. Earth sci. res. j. [Internet]. 1 de octubre de 2019 [citado 14 de julio de 2024];23(4):371-8. Disponible en: https://revistas.unal.edu.co/index.php/esrj/article/view/84113

Descargar cita

CrossRef Cited-by

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2. Xin Liu, Ying Guo. (2022). Study on the Color-Influencing Factors of Blue Iolite. Minerals, 12(11), p.1356. https://doi.org/10.3390/min12111356.

3. Xueding Wang, Ying Guo. (2021). The impact of trace metal cations and absorbed water on colour transition of turquoise. Royal Society Open Science, 8(2) https://doi.org/10.1098/rsos.201110.

4. Shidie Deng, Ying Guo. (2023). Investigation of Factors Affecting the Color of Serpentine Jade from Shandong, China. Crystals, 13(3), p.431. https://doi.org/10.3390/cryst13030431.

5. Fu-Kang Liu, Ying Guo, Bei Zhao, Xiang Li. (2022). The Color Origin and Evaluation of Natural Colored Diamonds. Science of Advanced Materials, 14(2), p.243. https://doi.org/10.1166/sam.2022.4210.

6. Ziyuan Liu, Ying Guo. (2022). The Effect of Munsell Neutral Value Scale on the Color of Yellow Jadeite and Comparison between AP and K-Means Clustering Color Grading Schemes. Crystals, 12(2), p.241. https://doi.org/10.3390/cryst12020241.

7. Tu Zou, Sha Ma, Minrou Cui, Liang Zhu, Yue Hao, Xianglin Fang, Lin Lin. (2023). Dual-modal identification of jadeite based on optical coherence tomography images and Raman spectral features. Applied Optics, 62(25), p.6779. https://doi.org/10.1364/AO.493387.

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