GB/T 24328.8-2020Tissue paper and tissue products - Part 8: Determination of optical properties--Measurement of brightness and colour--D65/10°(outdoor daylight conditions) (English PDF)
卫生纸及其制品 第8部分：光学性能的测定 亮度和颜色的测定 D65/10°（室外日光条件）
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Issued by
State Administration for Market Regulation, China National Standardization Administration
Level / Type
National · Recommended
Issue date
July 21, 2020
Implementation date
February 1, 2021
Scope
GB/T 24328.8-2020 is the English-translated version of 卫生纸及其制品 第8部分：光学性能的测定 亮度和颜色的测定 D65/10°（室外日光条件）.
GB/T 24328.8-2020 is the Chinese standard "Tissue paper and tissue products - Part 8: Determination of optical properties--Measurement of brightness and colour--D65/10°(outdoor daylight conditions)".
Its scope clause reads: This part of GB/T 24328 specifies the method for determining the brightness and color of toilet paper and its products under outdoor sunlight conditions.
This section applies to toilet paper and its products. Note. The ultraviolet (UV) content of the instrument for measuring C/2° brightness and color is much lower than that specified in this section.
GB/T 24328.11 describes C/2° brightness and color Method of measurement. Its clauses include terms and definitions.
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Document preview — GB/T 24328.8-2020
National Standard of the People's Republic of China
- ICS
- 85.010
- Classification
- Y 30
Issued by: State Administration for Market Regulation, China National Standardization Administration
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 3.1 Reflection factor
- 3.2 Diffuse(radiance)reflectancefactor
1 Scope
This part of GB/T 24328 specifies the method for determining the brightness and color of toilet paper and its products under outdoor sunlight conditions.
This section applies to toilet paper and its products.
Note. The ultraviolet (UV) content of the instrument for measuring C/2° brightness and color is much lower than that specified in this section. GB/T 24328.11 describes C/2° brightness and color
Method of measurement.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
The collection of GB/T 450 paper and paperboard samples and the determination of the longitudinal and transverse directions, front and back sides of the samples (GB/T 450-2008, ISO 186.
2002, MOD)
GB/T 7973 Determination of diffuse reflection factor of paper, paperboard and pulp (diffuse/vertical method) (GB/T 7973-2003, ISO 2469.
1994, NEQ)
GB/T 10739 Standard atmospheric conditions for handling and testing of paper, paperboard and pulp samples (GB/T 10739-2002, eqvISO 187.1990)
GB/T 22880-2008 Determination of CIE Whiteness of Paper and Paperboard, D65/10° (outdoor sunlight) (ISO 11475.2004, MOD)
ISO 5631-2.2015 Paper and cardboard color determination (diffuse reflectance method) Part 2.Outdoor daylight conditions (D65/10°)
[Paperandboard-Determinationofcolourbydiffusereflectance-Part 2.Outdoordaylightconditions (D65/10degrees)]
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Reflection factor
The ratio of the radiant flux reflected by an object to the radiant flux reflected by a fully reflective diffuser under the same conditions.
Note 1.The reflection factor is expressed as a percentage.
Note 2.If the object is translucent, the reflection factor is affected by the backing.
3.2 Diffuse(radiance)reflectancefactor
The ratio of the radiation reflected and excited by an object to the reflection of a fully reflective diffuser under the same conditions.
Note. The ratio is expressed as a percentage.
GB/T 24328.3 | GB/T 27741 | GB/T 31905 | GB/T 24328.13 | GB/T 24328.1 | GB/T 24328.11 | […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 450Paper and board -- Sampling for testing and identification of machine and cross direction, wire side and felt side
- GB/T 450-2008Paper and board -- Sampling for testing and identification of machine and cross direction, wire side and felt side
- GB/T 7973Paper, board and pulps -- Measurement of diffuse reflectance factor (Diff/Geometry)
- GB/T 7973-2003Paper, board and pulps -- Measurement of diffuse reflectance factor (Diff/Geometry)
- GB/T 10739Paper, board and pulps - Standard atmosphere for conditioning and testing
- GB/T 10739-2002Paper, board and pulps - Standard atmosphere for conditioning and testing
ISO 186 · ISO 2469 · ISO 11475.2004 · ISO 5631
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Related Standards
GB/T 10739-2002 — Paper, board and pulps - Standard atmosphere for conditioning and testing
GB/T 10739-2023 — Paper, board and pulps - Standard atmosphere for conditioning and testing
GB/T 22880-2008 — Paper and board -- Determination of CIE whiteness, D65/10-degree (outdoor daylight)
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