ASTM G24-05

Standard Practice for Conducting Exposures to Daylight Filtered Through Glass

SCOPE
1.1 This practice evaluates the resistance of nonmetallic materials to solar radiation filtered through glass.
1.2 For direct exposures, refer to Practice G 7.
1.3 This practice is limited to the method of conducting the exposures. The preparation of test specimens and evaluation of results are covered in various standards for the specific materials.
1.4 Exposure conducted according to this practice can use two types of exposure cabinets.
1.4.1 Type AA cabinet that allows passive ventilation of specimens being exposed behind glass.
1.4.2 Type BEnclosed cabinet with exterior painted black that allows no ventilation of specimens exposed behind glass. Exposures conducted using a Type B cabinet are typically referred to as "black box under glass exposures."
1.5 Type A exposures of this practice are technically similar to Method B of ISO 877.
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.

General Information

• Status: Historical
• Publication Date: 31-Dec-2004
• ICS: 59.080.01 - Textiles in general
• Technical Committee: G03 - Weathering and Durability
• Drafting Committee: G03.02 - Natural and Environmental Exposure Tests

Relations

• Replaces: ASTM G24-97 - Standard Practice for Conducting Exposures to Daylight Filtered Through Glass
• Effective Date: 01-Jan-2005
• Referred By: ASTM D4303-10(2022) - Standard Test Methods for Lightfastness of Colorants Used in Artists' Materials
• Effective Date: 01-Jan-2005
• Referred By: ASTM D6901-15(2021) - Standard Specification for Artists' Colored Pencils
• Effective Date: 01-Jan-2005
• Referred By: ASTM D4364-13(2022)e1 - Standard Practice for Performing Outdoor Accelerated Weathering Tests of Plastics Using Concentrated Sunlight
• Effective Date: 01-Jan-2005
• Referred By: ASTM G7/G7M-21 - Standard Practice for Natural Weathering of Materials
• Effective Date: 01-Jan-2005
• Referred By: ASTM D8330-20 - Standard Specification for Artists’ Pastels
• Effective Date: 01-Jan-2005
• Referred By: ASTM G90-23 - Standard Practice for Performing Accelerated Outdoor Weathering of Materials Using Concentrated Natural Sunlight
• Effective Date: 01-Jan-2005
• Referred By: ASTM D1435-20 - Standard Practice for Outdoor Weathering of Plastics
• Effective Date: 01-Jan-2005
• Referred By: ASTM C1589/C1589M-18(2023) - Standard Practice for Outdoor Weathering of Construction Seals and Sealants
• Effective Date: 01-Jan-2005
• Referred By: ASTM G178-16(2023) - Standard Practice for Determining the Activation Spectrum of a Material (Wavelength Sensitivity to an Exposure Source) Using the Sharp Cut-On Filter or Spectrographic Technique
• Effective Date: 01-Jan-2005
• Referred By: ASTM G147-17 - Standard Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests
• Effective Date: 01-Jan-2005
• Referred By: ASTM G156-17 - Standard Practice for Selecting and Characterizing Weathering Reference Materials
• Effective Date: 01-Jan-2005
• Referred By: ASTM G183-15(2023) - Standard Practice for Field Use of Pyranometers, Pyrheliometers and UV Radiometers
• Effective Date: 01-Jan-2005
• Referred By: ASTM G141-09(2021) - Standard Guide for Addressing Variability in Exposure Testing of Nonmetallic Materials
• Effective Date: 01-Jan-2005
• Referred By: ASTM G201-16 - Standard Practice for Conducting Exposures in Outdoor Glass-Covered Exposure Apparatus with Air Circulation
• Effective Date: 01-Jan-2005

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: G24 − 05
StandardPractice for
1
Conducting Exposures to Daylight Filtered Through Glass
ThisstandardisissuedunderthefixeddesignationG24;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Transmittance of Materials Using Integrating Spheres
3
(Withdrawn 2005)
1.1 This practice evaluates the resistance of nonmetallic
E1084Test Method for Solar Transmittance (Terrestrial) of
materials to solar radiation filtered through glass.
Sheet Materials Using Sunlight
1.2 For direct exposures, refer to Practice G7. G7Practice for Atmospheric Environmental Exposure Test-
ing of Nonmetallic Materials
1.3 This practice is limited to the method of conducting the
G113Terminology Relating to Natural andArtificialWeath-
exposures.Thepreparationoftestspecimensandevaluationof
ering Tests of Nonmetallic Materials
results are covered in various standards for the specific
G173TablesforReferenceSolarSpectralIrradiances:Direct
materials.
Normal and Hemispherical on 37° Tilted Surface
1.4 Exposure conducted according to this practice can use G177Tables for Reference Solar Ultraviolet Spectral Distri-
butions: Hemispherical on 37° Tilted Surface
two types of exposure cabinets.
1.4.1 Type A—A cabinet that allows passive ventilation of 2.2 Other Documents:
specimens being exposed behind glass. WMO Guide to Meteorological Instruments and Methods of
4
Observation WMO No. 8,Fifth Edition.
1.4.2 Type B—Enclosed cabinet with exterior painted black
ISO 105 B01Textiles—Tests for Colour Fastness, Interna-
that allows no ventilation of specimens exposed behind glass.
5
tional Standards Organization, Geneva, Switzerland.
Exposures conducted using a Type B cabinet are typically
ISO 877 Plastics—Methods of Exposure to Direct
referred to as “black box under glass exposures.”
Weathering, toWeathering Using Glass-Filtered Daylight,
1.5 TypeAexposuresofthispracticearetechnicallysimilar
and to Intensified Weathering by Daylight Using Fresnel
to Method B of ISO877.
Mirrors, International Standards Organization, Geneva,
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Switzerland
1.6 This standard does not purport to address all of the
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AATCC 16CColorfastness to Light, Daylight
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3. Terminology
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
3.1 Definitions:
3.1.1 The definitions contained in Terminology G113 are
2. Referenced Documents
applicable to this practice.
2
2.1 ASTM Standards:
4. Significance and Use
C1036Specification for Flat Glass
4.1 Since solar irradiance, air temperature, relative
E824Test Method for Transfer of Calibration From Refer-
humidity, and the amount and kind of atmospheric contami-
ence to Field Radiometers
nants vary continuously, results from exposures based on time
E903Test Method for Solar Absorptance, Reflectance, and
may differ. The variations in the results may be minimized by
timing the exposures in terms of one or more environmental
1
ThispracticeisunderthejurisdictionofASTMCommitteeG03onWeathering
and Durabilityand is the direct responsibility of Subcommittee G03.02 on Natural
3
and Environmental Exposure Tests. The last approved version of this historical standard is referenced on
Current edition approved Jan. 1, 2005. Published February 2005. Originally www.astm.org.
4
approved in 1973. Last previous edition approved in 1997 as G24–97. DOI: Available from World Meteorological Organization, Geneva, Switzerland.
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10.1520/G0024-05. Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 4th Floor, New York, NY 10036.
6
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Available from American Association of Textile Chemists and Colorists
Standards volume information, refer to the standard’s Document Summary page on (AATCC), One Davis Dr., P.O. Box 12215, Research Triangle Park, NC 27709-
the ASTM website. 2215.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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G24−05
FIG. 1 a and 1b Typical Well-Ventilated Under Glass Exposure Cabinet, Type A
degradation for materials sensitive to short wavelength UV
7
from 300 to 320 nm could vary by as much as 300%.
4.5 DifferencesinUVtransmissionbetweendifferentlotsof
glass persist after solarization. The largest differences among
windowglassesinUVtransmissionareinthespectralrangeof
300 to 320 nm. Use of radiant exposure bas
...