ASTM E1809-96

Standard Test Method for Measurement of High-Visibility Retroreflective-Clothing Marking Material Using a Portable Retrorelectometer

SCOPE
1.1 This test method covers the measurement of the retroreflective properties of high visibility pedestrian garments, such as vests, using a portable retroreflectometer that can be used in the field. The portable retroreflectometer is a hand-held instrument with a defined standard geometry that can be placed in contact with retroreflective marking material to measure the retroreflection. The measurements can be compared to minimum requirements to determine the need for replacement of the retroreflective material.
1.2 This test method is designed for measuring retroreflective marking materials that have an area equal to or greater than that of the aperture of the retroreflectometer.
1.3 This test method is intended to be used for field measurement of retroreflective marking materials, but may be used to measure the performance of materials before placing the clothing in use.
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.

General Information

• Status: Historical
• Publication Date: 09-Dec-2001
• ICS: 13.340.10 - Protective clothing
• ICS: 17.180.01 - Optics and optical measurements in general
• Technical Committee: E12 - Color and Appearance
• Drafting Committee: E12.10 - Retroreflection

Relations

• Replaced By: ASTM E1809-01 - Standard Test Method for Measurement of High-Visibility Retroreflective-Clothing Marking Material Using a Portable Retroreflectometer (Withdrawn 2010)
• Effective Date: 10-Dec-2001

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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: E 1809 – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Measurement of High-Visibility Retroreflective-Clothing
1
Marking Material Using a Portable Retroreflectometer
This standard is issued under the fixed designation E 1809; 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.
1. Scope intensity (R ) of a plane retroreflecting surface to its area (A),
I
−1 −2
expressed in candelas per lux per square metre (cd·lx ·m ).
1.1 This test method covers the measurement of the retrore-
flective properties of high visibility pedestrian garments, such R 5 R /A (1)
A I
as vests, using a portable retroreflectometer that can be used in
3.2.2 entrance angle, b, n—angle between the illumination
the field. The portable retroreflectometer is a hand-held instru-
axis and the retroreflector axis.
ment with a defined standard geometry corresponding to
3.2.3 instrument standard, n—a working standard used to
United States usage that can be placed in contact with
standardize the portable retroreflectometer.
retroreflective marking material to measure the retroreflection.
3.2.4 observation angle, n—angle between the illumination
The measurements can be compared to minimum requirements
axis and the observation axis.
to determine the need for replacement.
3.2.5 portable retroreflectometer, n—a hand-held instru-
1.2 This test method is designed for measuring retroreflec-
ment that can be used in the field or in the laboratory to
tive marking materials that have an area equal to or greater than
measure retroreflection.
that of the aperture of the retroreflectometer.
3.2.5.1 Discussion—In this test method, portable retrore-
1.3 This test method is intended to be used for field
flectometer refers to a hand-held instrument that can be placed
measurement of retroreflective marking materials, but may be
in contact with retroreflective marking material to measure the
used to measure the performance of materials before placing
coefficient of retroreflection in a standard geometry.
the clothing in use.
3.2.6 presentation angle, g, n—angle between the observa-
1.4 This standard does not purport to address all of the
tion half-plane and the half-plane that originates on the
safety concerns, if any, associated with its use. It is the
illumination axis and that contains the retroreflector axis.
responsibility of the user of this standard to establish appro-
3.2.7 retroreflection, n—reflection in which the reflected
priate safety and health practices and determine the applica-
rays are preferentially returned in directions close to the
bility of regulatory limitations prior to use.
opposite of the direction of the incident rays, this property
being maintained over wide variations of the direction of the
2. Referenced Documents
incident rays.
2.1 ASTM Standards:
3.2.8 rotation angle, e, n—angle indicating the orientation
2
E 284 Terminology of Appearance
of the specimen when it is rotated about the retroreflector axis.
E 809 Practice for Measuring Photometric Characteristics
3.2.8.1 Discussion—The rotation angle is the dihedral angle
2
of Retroreflectors
from the half-plane originating on the retroreflector axis and
E 810 Test Method for Coefficient of Retroreflection of
containing the positive part of the second axis to the half-plane
2
Retroreflective Sheeting
originating on the retroreflector axis and containing the datum
mark. Range: − 180° < e # 180°.
3. Terminology
3.1 The terminology used in this test method, in general,
4. Summary of Test Method
agrees with that used in Terminology E 284.
4.1 This test method involves the use of commercial por-
3.2 Definitions—The delimiting phrase in retroreflection
table retroreflectometers for determining the retroreflectivity of
applies to each of the following definitions when used outside
retroreflective marking material(s) on garments.
the context of this or other retroreflection standards.
4.2 Unless otherwise specified by the user, the entrance
3.2.1 coeffıcient of retroreflection, R , n—of a plane retrore-
A
angle shall be 5.0° and the observation angle shall be 0.33°.
flecting surface, the ratio of the coefficient of luminous
4.2.1 The angles specified are those currently employed in
the United States and may differ from angles used in other
1
This test method is under the jurisdiction of ASTM Committee E-12 on
countries.
Appearance and is the direct responsibility of Subcommittee E12.10 on Retrore-
4.3 The portable retroreflectometer uses an instrument stan-
flection.
dard for standar
...