ASTM D4674-02a

Standard Practice for Accelerated Testing for Color Stability of Plastics Exposed to Indoor Office Environments

SIGNIFICANCE AND USE
Tests conducted in accordance with this practice are intended to induce property changes associated with use exposure to light and heat in typical office environments. These exposures are not intended to simulate the deterioration caused by localized phenomena such as handling, dirt contamination, etc.
Note 5—Caution: Caution: Refer to practice G 151 for full cautionary guidance applicable to all laboratory weathering devices. Additional information on sources of variability and on strategies for addressing variability by design and data analysis of laboratory accelerated exposure tests is found in Guide G 141.
Variation in results may be expected are possible between the different methods described in this practice. For example, differences in spectral distribution of the lamps used and variations in the irradiance for a single type of lamp can cause significant differences in test results. Therefore, any no reference to the use of this practice should be made unless accompanied by a report prepared in accordance with Section 12 that describes needs to include a reference to the method used.
Reproducibility of test results between laboratories has been shown to be good when the stability of materials is evaluated in terms of performance ranking compared to other materials or to a control. Therefore, exposure of a similar material of known performance (a control) at the same time as the test materials is strongly recommended. It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results.
SCOPE
1.1 This practice covers the basic principles and operating procedures for using fluorescent light to determine color stability of plastics when materials are exposed in typical office environments where fluorescent overhead lighting and window-filtered daylight are used for illumination and where temperature and humidity conditions are in accordance with American Society of Heating, Refrigerating, and Air-conditioning Engineers (ASHRAE) recommendations for workers' comfort.
Note 1—There is no equivalent ISO standard.
1.2 This practice describes four methods where specimens are exposed to fluorescent light under controlled environmental conditions. Two of the methods use an exposure device that provides for mixing of fluorescent lamps and two of the methods use devices that comply with Practice G 154.
Note 2Method I uses cool white fluorescent lamps and window glass filtered fluorescent UVB lamps and is the same method described in previous versions of this standard.
1.3 Specimen preparation and evaluation of the results are covered in ASTM methods or specifications for specific materials. General guidance is given in Practice G 151. More specific information about methods for determining the change in properties after exposure and reporting these results is described in Practice D 5870.
1.4 The values stated in SI units are to be regarded as the standard.
1.5 Unless otherwise specified, all dimensions are nominal.
1.6 This practice may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns, is 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. Specific precautionary statements are given in Section 7.

General Information

• Status: Historical
• Publication Date: 09-Dec-2002
• ICS: 83.080.01 - Plastics in general
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.50 - Durability of Plastics

Relations

• Replaces: ASTM D4674-02 - Standard Test Method for Accelerated Testing for Color Stability of Plastics Exposed to Indoor Fluorescent Lighting and Window-Filtered Daylight
• Effective Date: 10-Dec-2002
• Replaced By: ASTM D4674-02a(2010) - Standard Practice for Accelerated Testing for Color Stability of Plastics Exposed to Indoor Office Environments (Withdrawn 2019)
• Effective Date: 01-Oct-2010
• Referred By: ASTM D4303-10(2022) - Standard Test Methods for Lightfastness of Colorants Used in Artists' Materials
• Effective Date: 10-Dec-2002
• Referred By: ASTM D5870-22 - Standard Practice for Calculating Property Retention Index of Plastics
• Effective Date: 10-Dec-2002
• Referred By: ASTM D4459-21 - Standard Practice for Xenon-Arc Exposure of Plastics Intended for Indoor Applications
• Effective Date: 10-Dec-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D4674 – 02a
Standard Practice for
Accelerated Testing for Color Stability of Plastics Exposed
1
to Indoor Office Environments
This standard is issued under the fixed designation D4674; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2
1.1 This practice covers the basic principles and operating 2.1 ASTM Standards:
procedures for using fluorescent light to determine color D1729 Practice for Visual Appraisal of Colors and Color
stabilityofplasticswhenmaterialsareexposedintypicaloffice Differences of Diffusely-Illuminated Opaque Materials
environments where fluorescent overhead lighting and D2244 Practice for Calculation of Color Tolerances and
window-filtered daylight are used for illumination and where Color Differences from Instrumentally Measured Color
temperature and humidity conditions are in accordance with Coordinates
American Society of Heating, Refrigerating, and Air- D3980 Practice for Interlaboratory Testing of Paint and
3
conditioning Engineers (ASHRAE) recommendations for Related Materials
workers’ comfort. D5870 Practice for Calculating Property Retention Index of
Plastics
NOTE 1—There is no equivalent ISO standard.
E691 Practice for Conducting an Interlaboratory Study to
1.2 This practice describes four methods where specimens
Determine the Precision of a Test Method
areexposedtofluorescentlightundercontrolledenvironmental
G113 TerminologyRelatingtoNaturalandArtificialWeath-
conditions. Two of the methods use an exposure device that
ering Tests of Nonmetallic Materials
provides for mixing of fluorescent lamps and two of the
G141 Guide forAddressing Variability in Exposure Testing
methods use devices that comply with Practice G154.
of Nonmetallic Materials
G147 Practice for Conditioning and Handling of Nonmetal-
NOTE 2—MethodIusescoolwhitefluorescentlampsandwindowglass
filtered fluorescent UVB lamps and is the same method described in lic Materials for Natural and Artificial Weathering Tests
previous versions of this standard.
G151 Practice for Exposing Nonmetallic Materials in Ac-
celerated Test Devices that Use Laboratory Light Sources
1.3 Specimen preparation and evaluation of the results are
G154 Practice for Operating Fluorescent Light Apparatus
covered in ASTM methods or specifications for specific
for UV Exposure of Nonmetallic Materials
materials. General guidance is given in Practice G151. More
G169 Guide forApplication of Basic Statistical Methods to
specific information about methods for determining the change
Weathering Tests
in properties after exposure and reporting these results is
described in Practice D5870.
3. Terminology
1.4 The values stated in SI units are to be regarded as the
3.1 Definitions—The definitions given in Terminology
standard.
G113 are applicable to this practice.
1.5 Unless otherwise specified, all dimensions are nominal.
1.6 This practice may involve hazardous materials, opera-
4. Summary of Practice
tions, and equipment. This standard does not purport to
4.1 This practice provides for the exposure of specimens to
address all of the safety concerns, is any, associated with its
fluorescent light under controlled environmental conditions.
use. It is the responsibility of the user of this standard to
Radiant energy is provided by one of the following fluorescent
establish appropriate safety and health practices and deter-
light sources: (1) VHO cool-white fluorescent lamps and glass
mine the applicability of regulatory limitations prior to use.
filtered fluorescent UV lamps, (2) VHO cool-white fluorescent
Specific precautionary statements are given in Section 7.
1 2
ThispracticeisunderthejurisdictionofASTMCommitteeD20onPlasticsand For referenced ASTM standards, visit the ASTM website, www.astm.org, or
is the direct responsibility of Subcommittee D20.50 on Durability of Plastics. contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Current edition approved December 10, 2002. Published February 2003. Origi- Standards volume information, refer to the standard’s Document Summary page on
nallyapprovedin1987.Lastpreviouseditionapprovedin2002asD4674 - 02.DOI: the ASTM website.
3
10.1520/D4674-02A. Withdrawn.
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D4674 – 02a
lamps alone, (3) standard output cool white fluorescent lamps andglassfilteredUVfluorescentlampsispossible,andshallbe
alone, or (4) UVA-351 fluorescent UVA lamps. equipped with a radiometer complying with the requirements
4.1.1 Meth
...