GB/T 7771-2008 English PDF

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GB/T 7771-2008: Measurement of special metamerism index -- Change in illuminant
Status: Valid

GB/T 7771: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 7771-2008	139	Add to Cart	3 days	Measurement of special metamerism index -- Change in illuminant	Valid
GB/T 7771-1987	239	Add to Cart	2 days	Measurement of special metamerism index change in illuminant	Obsolete

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Basic data

Standard ID: GB/T 7771-2008 (GB/T7771-2008)
Description (Translated English): Measurement of special metamerism index -- Change in illuminant
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G55
Classification of International Standard: 71.100.01; 87.060.10
Word Count Estimation: 6,688
Date of Issue: 2008-09-18
Date of Implementation: 2009-05-01
Older Standard (superseded by this standard): GB/T 7771-1987
Quoted Standard: GB/T 3979-2008; GB/T 6688-2008
Regulation (derived from): National Standard Approval Announcement 2008 No.16 (Total No.129)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the prediction and evaluation of blending color dye color samples with the standard sampling method when the illumination color change effect when the match. This standard applies to predictive evaluation blending dye color samples with the standard color samples match the color change when the body when lighting effects. This standard does not apply when changing illumination, color or single color samples generated tristimulus values ??X, Y, change Z's. This standard does not apply to problems caused by changing the color chromaticity and other observers so affected.

GB/T 7771-2008: Measurement of special metamerism index -- Change in illuminant

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Measurement of special metamerism index. Change in illuminant ICS 71.100.01; 87.060.10 G55 National Standards of People's Republic of China Replacing GB/T 7771-1987 Determination of special metamerism index change of illumination Posted 2008-09-18 2009-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard replaces GB/T 7771-1987 "Determination of special metamerism index change of illumination." The main changes compared to 7771-1987 standard and GB/T as follows. --- Increased (3rd edition chapter) chapter "Terms and Definitions"; --- Remove the original standard 4.2 Table 1F illumination relative spectral power distribution data and Table 2F illumination and fill CIE1964 Charge standard colorimetric observer color matching functions of weighting coefficients (1987 Version 4.2); --- Increasing the content of the test report (Chapter 8 of this edition). The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee Dye (SAC/TC134) centralized. This standard was drafted. Shenyang Chemical Research Institute, Shenyang Cai Pu Technology Co., Ltd. The main drafters of this standard. Ji Qin Lan, Li Qin. This standard replaces the standards previously issued as follows. --- GB/T 7771-1987. Determination of special metamerism index change of illumination

1 Scope

This standard specifies the prediction and evaluation of blending dye samples with the standard method of color swatches to change color when the illumination effect when the match. This standard applies to prediction and evaluation of blending dye samples with the standard color swatches to change color when the match when illumination effect. This standard does not apply when the change of illumination, color or single color samples generated tristimulus values \u200b\u200bchange X, Y, Z's. This standard does not apply to problems caused by changing the color of the observer to make other colors affected.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. Methods of measurement GB/T 3979-2008 object colors Determination of GB/T 6688-2008 relative dye strength and color of the instrumental method

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 In observing the conditions prescribed, although spectral composition is different, but the same two color perception color stimulus. [GB/T 5698-2001 in 4.21] Note. The specified viewing conditions refers to the observer and the field of view. For object color, it refers to the illumination light spectral power distribution. 3.2 Hereinafter the same color in the test conditions for the overall color difference between different spectrum. Principle 4 If two different color samples in the visible spectral radiance distribution within the spectrum, and given the reference illumination and reference have the observer With tristimulus values \u200b\u200b(X1 = X2, Y1 = Y2, Z1 = Z2), two color swatches of color is color metamerism. For reference illumination and reference observer has two color swatches same tristimulus values, metamerism index is equal to the measured Mt Two color difference value ΔE color swatch lighting body t calculated two different color that is a function of the reflectivity of the sample in a given illumination and a given color It has the same tristimulus values \u200b\u200bunder the conditions of the viewer, changing its color illumination larger metamerism effects are more obvious. This standard Mt can quantify the degree of metamerism effects.

5 General Provisions

5.1 generally use International Commission on Illumination CIE standard illuminant D65 as the reference illuminant. Such as the use of other illumination should be described. 5.2 using CIE standard illuminant A body is a test or other lighting illumination. 5.3 Use of GB/T 3979-2008 specified in CIE1964 standard colorimetric observer.

6 color samples measured

6.1 color samples ready to perform according to GB/T 6688-2008 5.2.1 provisions. ......

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