GB/T 32387-2015 English PDF (GBT32387-2015)

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GB/T 32387-2015: Color assessment booth
GB/T 32387-2015
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 17.180.20
N 34
Color assessment booth
ISSUED ON: DECEMBER 31, 2015
IMPLEMENTED ON: AUGUST 01, 2016
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 Structure ... 4
5 Technical requirements ... 5
6 Test methods ... 6
7 Inspection rules ... 7
8 Marking, packaging, transportation and storage ... 9
Color assessment booth
1 Scope
This Standard specifies the structure, technical requirements, test methods, inspection
rules, as well as marking, packaging, transportation and storage of color assessment
booth.
This Standard applies to equipment of standard visual environment required for visual
color evaluation.
2 Normative references
The following referenced documents are indispensable for the application 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 191, Packaging - Pictorial marking for handling of goods
GB/T 3979-2008, Methods for the measurement of object color
GB/T 5698, Glossary of color terms
GB/T 5702, Method of measuring the color rendering properties of light sources
GB/T 7921-2008, Uniform color space and color difference formula
GB/T 7922, Method of measuring color of light sources
GB/T 10111-2008, Generation of random numbers and procedures applied to
sampling inspection for product quality
JJG 245, Verification regulation of illuminance meter
3 Terms and definitions
For the purpose of this document, terms and definitions given in GB/T 5698 apply.
4 Structure
The typical structure of a color assessment booth is shown in Figure 1.
5.4.2 The background color of the color assessment booth shall be neutral, and the
chroma difference ΔC௔௕∗ shall be controlled within 1.0.
5.5 Luminosity
5.5.1 Illuminance
Under rated working conditions, the illumination of the observation surface inside the
booth shall be 1 500 lx ~ 3 000 lx. The illumination inside the booth shall be evenly
distributed, and the ratio of any edge illumination to the center illumination shall be
within 0.8 ~ 1.1.
5.5.2 Color temperature
Under rated working conditions, the color temperature of the light source shall be within
±5% of the marked color temperature.
5.5.3 Color rendering index
Under rated working conditions, the general color rendering index Ra of the simulated
CIE standard illuminant D light source shall be greater than 90.
6 Test methods
6.1 Dimensions
Use a standard gauge with a graduation value of 1.0 mm to measure the dimensions of
the color assessment booth.
6.2 Appearance
When visual inspection is used to inspect the appearance of a color assessment booth,
the following provisions shall be followed:
a) Ambient illumination: 100 lx ~ 500 lx;
b) The distance between the observer’s eyes and the color assessment booth is
approximately 0.3 m.
6.3 Light source
Use the visual method to observe whether the light source flickers or becomes bright or
dark under normal working conditions.
6.4 Booth background