ASTM E810-03(2013)
Standard Test Method for Coefficient of Retroreflection of Retroreflective Sheeting Utilizing the Coplanar Geometry

Standard No.

ASTM E810-03(2013)

Release Date

2003

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM E810-20

Latest

ASTM E810-20

Scope

5.1 Measurements made by this test method are related to visual observations of retroreflective sheeting as seen by the human eye when illuminated by tungsten-filament light sources such as a motor vehicle headlamp.

5.2 The values determined relate to the visual effects for a given geometric configuration as specified by the user of the test method. This test method has been found useful for tests at observation angles between 0.1 and 2.0?? (observation angles between 0.1?? and 0.2?? may be achieved by careful design of source and receiver aperture configuration), and at entrance angles up to 60??. It has been used to determine coefficient of retroreflection values as low as 0.1 cd??lx^???1 ?? m^???2, but for values less than 1 cd??lx^???1 ?? m^???2 special attention must be given to the responsivity of the receiver and to the elimination of very small amounts of stray light.

1.1 This test method describes an instrument measurement of the retroreflective performance of retroreflective sheeting.

1.2 The user of this test method must specify the entrance and observation angles to be used, and may specify the rotation angles.

1.3 This test method is intended as a laboratory test and requires a facility that can be darkened sufficiently so that stray light does not affect the test results. The testing apparatus must be able to achieve the coplanar geometry.

1.4 Portable and bench retroreflection measuring equipment may be used to determine R_A values provided the geometry and appropriate substitution standard reference panels, measured in accordance with this test method, are utilized. In this case the methods of Procedure B in Practice E809 apply. Additional information on the use of portable retroreflectometers may be found in Test Method E1709.

1.5 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.

ASTM E810-03(2013) Referenced Document

• ASTM E1709 Standard Test Method for Measurement of Retroreflective Signs Using a Portable Retroreflectometer at a 0.2 Degree Observation Angle
• ASTM E284 Standard Terminology of Appearance
• ASTM E308 Standard Practice for Computing the Colors of Objects by Using the CIE System
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• ASTM E808 Standard Practice for Describing Retroreflection
• ASTM E809 Standard Practice for Measuring Photometric Characteristics of Retroreflectors

ASTM E810-03(2013) history

• 2020 ASTM E810-20 Standard Test Method for Coefficient of Retroreflection of Retroreflective Sheeting Utilizing the Coplanar Geometry
• 2003 ASTM E810-03(2013) Standard Test Method for Coefficient of Retroreflection of Retroreflective Sheeting Utilizing the Coplanar Geometry
• 2003 ASTM E810-03(2008) Standard Test Method for Coefficient of Retroreflection of Retroreflective Sheeting Utilizing the Coplanar Geometry
• 2003 ASTM E810-03 Standard Test Method for Coefficient of Retroreflection of Retroreflective Sheeting Utilizing the Coplanar Geometry
• 2001 ASTM E810-01 Standard Test Method for Coefficient of Retroreflection of Retroreflective Sheeting Utilizing the Coplanar Geometry
• 1994 ASTM E810-94(2000) Standard Test Method for Coefficient of Retroreflection of Retroreflective Sheeting Utilizing the Coplanar Geometry