GB/T 22879-2008 English PDF

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GB/T 22879-2008: Paper and board -- Determination of CIE whiteness, C/2-degree (indoor illumination conditions)
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 22879-2008	279	Add to Cart	3 days	Paper and board -- Determination of CIE whiteness, C/2-degree (indoor illumination conditions)	Valid

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Basic data

Standard ID: GB/T 22879-2008 (GB/T22879-2008)
Description (Translated English): Paper and board -- Determination of CIE whiteness, C/2-degree (indoor illumination conditions)
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y30
Classification of International Standard: 85-010
Word Count Estimation: 12,144
Date of Issue: 2008-12-30
Date of Implementation: 2009-09-01
Quoted Standard: GB/T 450; GB/T 7973-2003; GB/T 8940.2; ISO 2470; ASTM E308-95
Adopted Standard: ISO 11476-2000, MOD
Regulation (derived from): National Standard Approval Announcement 2008 No.25 (Total No.138)
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 method for measuring the whiteness of paper and paperboard. This standard applies with or without fluorescent brightener white paper and paperboard, not for colored paper containing fluorescent dyes.

GB/T 22879-2008: Paper and board -- Determination of CIE whiteness, C/2-degree (indoor illumination conditions)

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Paper and board.Determination of CIE whiteness, C/2-degree (indoor illumination conditions) ICS 85-010 Y30 National Standards of People's Republic of China Paper and cardboard CIE whiteness, C/2 ° (Indoor illumination conditions) (ISO 11476.2000, MOD) Posted 2008-12-30 2009-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This revised standard adopts ISO 11476.2000 "Paper and paperboard CIE whiteness, C/2 ° (indoor illumination conditions)." This standard and ISO 11476. Compared to 2000, the main differences. --- Normative references added GB/T 8940.2 and ASTME308-95; --- Amend Appendix B in UV calibration. This standard Annex A, Annex B normative appendix. The standard proposed by China National Light Industry Council. This standard by the National Standardization Technical Committee of the paper industry. This standard was drafted. China Pulp and Paper Research Institute, the national paper quality supervision and inspection center, China Paper Association Professional Committee of Standardization Members will. The main drafters of this standard. Zhangqing Wen. Paper and cardboard CIE whiteness, C/2 ° (Indoor illumination conditions)

1 Scope

This standard specifies the method for determination of whiteness of paper and paperboard. This standard applies with or without fluorescent whitening agents, white paper and cardboard, not for colored paper containing fluorescent dyes.

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. GB/T 450 and take samples to an aspect of paper and paperboard samples, positive and negative determination (GB/T 450-2008, ISO 186. 2002, MOD) GB/T 7973-2003 paper, paperboard and pulp measured diffuse reflectance factor (diffusion/vertical method) (ISO 2469.1994, NEQ) GB/T 8940.2 pulp brightness (whiteness) Sample Preparation (GB/T 8940.2-2002, eqv ISO 3688.1999) ISO 2470 Paper, board and pulp - Determination of diffuse blue reflectance factor (ISO brightness) ASTME308-95 estimated object color measurement method using the CIE system 3 Terms and definitions, code The following terms and definitions apply to this standard code. 3.1 By a flux of radiation reflected from an object under the same conditions perfectly reflecting diffuser reflected radiation flux ratio. Note. The ratio expressed as a percentage. 3.2 R∞ Sample layers to achieve opaque, that the measurement result is no longer doubled reflection factor change occurs when the number of layers with the sample. 3.3 By the radiance of an object in the same light source and viewing conditions totally reflected radiance of the diffuser ratio. NOTE. fluorescent (luminescent) material, the total radiance factor β is the sum of the reflected radiance factor βS and luminous radiance factor βL two parts, namely. β = βS + βL. For non-fluorescent material, the reflected radiance factor βS simple reflection factor R. 3.4 β∞ Inner radiance factor of the sample when stacked thick enough to achieve opaque, that is no longer doubled radiation measurement results and changes with time of sample layers Luminance factor. ......

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