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QB/T 2804-2006Paper and cardboard whiteness assay 45/ 0 directional reflection (English PDF)

纸和纸板白度测定法 450定向反射法

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Issued by

Ministry of Industry and Information Technology

Level / Type

National · Recommended

Issue date

July 27, 2006

Implementation date

October 11, 2006

Scope

QB/T 2804-2006 is the English-translated version of 纸和纸板白度测定法 450定向反射法.

QB/T 2804-2006 — This standard specifies the order D65 illumination, paperboard blue directional diffuse reflectance factor R457 (paper and paperboard whiteness) method for the determination 45/0 light viewing conditions.

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Document preview — QB/T 2804-2006

National Standard of the People's Republic of China

ICS: 85.060
Classification: Y 30
Replacing: GB/T 8940.1-1988

Issued by: Ministry of Industry and Information Technology

What this standard covers1
Document data2

What this standard covers

This standard specifies the order D65 illumination, paperboard blue directional diffuse reflectance factor R457 (paper and paperboard whiteness) method for the determination 45/0 light viewing conditions. This standard applies to nearly white, paperboard sample containing fluorescent whitening agents or non-fluorescent brighteners.

Document data

International classification (ICS): 85.060.

Chinese classification (CCS): Y30.

Estimated length of the Chinese original: 4,498 words.

Supersedes the earlier edition GB/T 8940.1-1988.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 3 pages — is available in the English PDF.

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