ASTM D4956-09 - 1.8.2009
 
1. Scope

1.1 This specification covers flexible, non-exposed glass bead lens and microprismatic, retroreflective sheeting designed for use on traffic control signs, delineators, barricades, and other devices.

1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.3 The following safety hazards caveat pertains only to the test methods portion, Section 7, of this specification. 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.

 
2. Referenced Documents

B449-93(2022)

Standard Specification for Chromates on Aluminum

E1349-06(2022)

Standard Test Method for Reflectance Factor and Color by Spectrophotometry Using Bidirectional (45?:0? or 0?:45?) Geometry

B209-14

Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate

B209M-14

Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate (Metric) (Withdrawn 2021)

E1347-06(2020)

Standard Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry

E1247-12(2023)

Standard Practice for Detecting Fluorescence in Object-Color Specimens by Spectrophotometry

E1164-23

Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation

E991-21(2025)

Standard Practice for Color Measurement of Fluorescent Specimens Using the One-Monochromator Method

E811-09(2025)

Standard Practice for Measuring Colorimetric Characteristics of Retroreflectors Under Nighttime Conditions

E810-20(2025)

Standard Test Method for Coefficient of Retroreflection of Retroreflective Sheeting Utilizing the Coplanar Geometry

E808-23

Standard Practice for Describing Retroreflection

E308-22

Standard Practice for Computing the Colors of Objects by Using the CIE System

E284-25

Standard Terminology of Appearance

D2794-93(2024)

Standard Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact)

ISO 4892-2:2006/Amd.1:2009 Plastics

Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps

G155-25

Standard Practice for Operating Xenon Arc Lamp Apparatus for Exposure of Materials

E2152-12(2023)

Standard Practice for Computing the Colors of Fluorescent Objects from Bispectral Photometric Data

E2153-01(2023)

Standard Practice for Obtaining Bispectral Photometric Data for Evaluation of Fluorescent Color

E2301-12(2022)

Standard Test Method for Daytime Colorimetric Properties of Fluorescent Retroreflective Sheeting and Marking Materials for High Visibility Traffic Control and Personal Safety Applications Using 45?:Normal Geometry

G7-05

Standard Practice for Atmospheric Environmental Exposure Testing of Nonmetallic Materials

G113-24

Standard Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials

G147-24

Standard Practice for Conditioning and Handling of Materials for Natural and Artificial Weathering Tests

G151-26

Standard Practice for Exposing Materials in Accelerated Test Devices that Use Laboratory Light Sources