Standard Test Method for Photopic Luminance of Photoluminescent (Phosphorescent) Markings

SCOPE
1.1 This test method covers a procedure for determining the photopic luminance of photoluminescent (phosphorescent) markings. It does not cover scotopic or mesopic measurements.
1.2 When reference is made regarding photoluminescence in the text of this test method, it implies phosphorescence.
1.3 The values stated in SI units are the standard. The values given in parentheses are provided for information purposes only.
1.4 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.

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Publication Date
09-Jun-2002
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ASTM E2073-02 - Standard Test Method for Photopic Luminance of Photoluminescent (Phosphorescent) Markings
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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An American National Standard
Designation:E2073–02
Standard Test Method for
Photopic Luminance of Photoluminescent (Phosphorescent)
1
Markings
This standard is issued under the fixed designation E 2073; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 5. Apparatus
1.1 This test method covers a procedure for determining the 5.1 Illuminance Meter—To measure the illumination of the
photopic luminance of photoluminescent (phosphorescent) activating light source on the surface of the photoluminescent
markings.Itdoesnotcoverscotopicormesopicmeasurements. marking, use an illuminance meter calibrated to measure
1.2 When reference is made regarding photoluminescence illuminance in lux (fc), with the following features: spectral
in the text of this test method, it implies phosphorescence. error, f 8,# 5 %; UV response, u,# 0.5 %; resolution 1.0 lux;
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1.3 ThevaluesstatedinSIunitsarethestandard.Thevalues and linearity error, f ,# 0.5 % (see Public. CIE No. 69).
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given in parentheses are provided for information purposes 5.2 Luminance Meter—To measure the photopic luminance
only. of photoluminescent markings, use a luminance meter with the
1.4 This standard does not purport to address all of the following minimum features (see Publication CIE No. 69):
safety concerns, if any, associated with its use. It is the spectral error, f 8,# 5 %; UV response, u,# 0.5 %; resolution
1
2
responsibility of the user of this standard to establish appro- at least 0.1 mcd/m ; linearity error, f , # 0.5 %; signal-to-
3
priate safety and health practices and determine the applica- noise-ratio: at least 10:1 for all measurements. The instrument
bility of regulatory limitations prior to use. shall have been calibrated within the preceding 12 months
using photometric standards traceable to a national standards
2. Referenced Documents
institute.
2.1 ASTM Standards:
2 6. Sampling, Test Specimens and Test Units
E 284 Terminology of Appearance
3
E 1316 Terminology for Non-Destructive Examinations 6.1 Method of Sampling—Take a minimum of three
E 2072 Specification for Photoluminescent (Phosphores- samples. Each sample shall be of a minimum size of at least 45
2
3
cent) Safety Markings mm (1 ⁄4 in.) in diameter. Select samples at random. If a
2.2 Other Standards: manufacturer,samplesshallberepresentativeoftheproduction
4
Publication CIE No. 69 (1987) lot, coded and identified to correspond to production batch
codes, and shall be numbered consecutively. Paints shall be
3. Terminology
applied in compliance with the manufacturer’s application
3.1 Definitions of terms in Terminology E 284 and Termi- instructions.
nology E 1316 are applicable to this specification.
7. Conditioning
4. Significance and Use
7.1 Precondition all test specimens by placing them in
4.1 To assess how photoluminescent markings perform complete darkness until their residual luminance has fallen to
2
under identical test conditions, the luminance shall be mea-
0.3 mcd/m or less, tested utilizing the luminance meter
sured in accordance with this test method (see Specification specified under 5.2. Remove them immediately before per-
E 2072).
forming the tests. No ambient or stray light shall be present.
8. Procedure
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This test method is under the jurisdiction of ASTM Committee E12 on Color
8.1 Ambient Conditions—The ambient temperature during
and Appearance , and is the direct responsibility of Subcommittee E12.13 on
darkness preconditioning of specimens, activation and lumi-
Photoluminescent Safety Markings.
Current edition approved June 10, 2002. Published August 2002. Originally nance testing shall be 25 6 3°C (77 6 5°F). The relative
published as E 2073 - 00. Last previous edition E 2073 - 00.
humidity shall not exceed 60 %.All luminance testing shall be
2
Annual Book of ASTM Standards, Vol 06.01.
performed in a room whose ambient light level is such that the
3
Annual Book of ASTM Standards, Vol 03.03.
4
luminance of a white diffuse reflectance standard is at least one
Available from the CIE-USNC Publications Office, c/o TLALighting Consult-
ants, 7 Pond St., Salem, MA 01970.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E2073–02
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TABLE 2 Afterglow Luminance Values (mcd/m)after60Minutes
decade lower than the lowest test specimen luminance mea-
surement to be recorded. Materials Average S S rR
r R
8.2 Preparation of Apparatus—The luminance meter shall
Sample
...

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