ASTM-D985 2007

$40.63

D985-97(2007) Standard Test Method for Brightness of Pulp, Paper, and Paperboard (Directional Reflectance at 457 nm) (Withdrawn 2010)

Published By	Publication Date	Number of Pages
ASTM	2007	6

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Category: ASTM

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Description

ASTM D985-97-Reapproved2007

Withdrawn Standard: Standard Test Method for Brightness of Pulp, Paper, and Paperboard (Directional Reflectance at 457 nm) (Withdrawn 2010)

ASTM D985

Scope

1.1 This test method determines the brightness of white, near-white, and naturally colored pulp, paper, and paperboard. Brightness is a commonly used industry term for the numerical value of the reflectance factor of a sample, with respect to blue light of specific spectral and geometric characteristics. This test method requires an instrument employing 45° illumination and 0° viewing geometry, with the illuminating and viewing beams adjusted so that translucent materials are evaluated on an arbitrary but specific scale (1-4).

1.2 This test method is applicable to all naturally-colored pulps, and papers and board made from pulps. The measurement is not suitable for paper and paperboard containing added coloring matter (such as yellow or green dyestuff) which appreciably absorbs light in that part of the spectrum extending from about 400 to 500 nm. Colored papers must be measured spectrophotometrically or colorimetrically in order to obtain meaningful results (TAPPI T442, T524, and T527). This test method is, however, suitable for pulps or papers which contain optical (fluorescent) brightening agents.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Keywords

brightness; directional reflectance; fluorescence; fluorescent component; opal glass standards; optical brighteners; photometric; spectra

ICS Code

ICS Number Code 85.060 (Paper and board)

DOI: 10.1520/D0985-97R07

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Summary of Test Method Significance and Use
2	Apparatus Sampling and Test Specimens Calibration Conditioning Procedure Report
3	Precision and Bias Keywords A1. SPECTRAL, GEOMETRIC, AND PHOTOMETRIC CHARACTERISTICS OF INSTRUMENT A1.1 A1.2 TABLE A1.1
4	A1.3 A2. CALIBRATION SERVICE A2.1 A2.2 A2.3 A2.4 A2.5 TABLE A1.2
5	A3. FLUORESCENT COMPONENT OF BRIGHTNESS A3.1 A3.2 A3.3 A3.4 A3.5 A3.6 A3.7 A3.8 A3.9 FIG. A3.1 FIG. A3.2 TABLE A3.1
6	REFERENCES

Additional information

Standard Title	D985-97(2007) Standard Test Method for Brightness of Pulp, Paper, and Paperboard (Directional Reflectance at 457 nm) (Withdrawn 2010)
Published Code	ASTM
Publication Date	2007
Pages Count	6