ASTM D4956 PDF

This specification does not address inks, overlays, or other imaging methods that may be applied to retroreflective sheeting material to create traffic signs or other devices. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Multi-user access to over 3, medical device standards, regulations, expert commentaries and other documents. Worldwide Standards We can source any standard from anywhere in the world.

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Retroreflective Sheeting Identification Guide General The following information and color table is being provided to inform road authority officials of the various types of retroreflective sheeting, typical applications, and brand names and manufacturers. The information is accurate as of the date of printing and subject to change as new materials are developed. Home ASTM D Retroreflective Sheeting Identification Guide General The following information and color table is being provided to inform road authority officials of the various types of retroreflective sheeting, typical applications, and brand names and manufacturers.

It is hoped that this information will assist the proper officials in making informed decisions regarding the materials they select for the traffic control devices on their roadways. It has been summarized to provide the basic information regarding retroreflective sheeting types and adhesive backing classes.

Technical information regarding the testing procedures that shall be followed to ensure conformance with ASTM specifications are available in the full version of the afore mentioned specification. Retroreflective sheeting shall consist of a white or colored sheeting having a smooth outer surface and that essentially has the property of a retroreflector over its entire surface. There are nine types and five classes of retroreflective sheeting.

Types are determined by conformance to the retrore- flectance, color, and durability requirements listed in section 6. Type designation is provided as a means for differentiating functional performance. Typical examples of applications are provided for descriptive information only and are not intended to be limitations or recommendations. Retroreflective sheeting shall he classified as follows: Type A medium-intensity retroreflective sheeting referred to as 'engineering grade" and typically enclosed lens glass-bead sheeting.

Typical applications for this material are permanent highway signing, construction zone devices, and delineators. Type II-- A medium-high-intensity retroreflective sheeting sometimes referred to as "super engineer grade" and typically enclosed lens glass-bead sheeting.

Type III-- A high-intensity retroreflective sheeting, that is typically encapsulated glass-bead retroreflective material. Typical applications for this material are permanent highway signing, construction zone devices, and delineators, Type IV-- A high-intensity retroreflective sheeting. This sheeting is typically an unmetallized microprismatic retroreflective element material.

Type V-- A super-high-intensity retroreflective sheeting. This sheeting is typically a metallized microprismatic retroreflective element material. This sheeting is typically used for delineators. Type VI-- An elastomerie high-intensity retroreflective sheeting without adhesive. This sheeting is typically a vinyl microprismatic retroreflective material. This sheeting is typically used for orange temporary roll-up warning signs, traffic cone collars, and post bands.

Type VII-- A super-high-intensity retroreflective sheeting having highest retroreflectivity charac- teristics at long and medium road distances. Type VIII-- A super-high-intensity retroreflective sheeting having highest retroreflectivity charac- teristics at long and medium road distances. Typical applications for this material are permanent highway signing, construction zone devices. Type IX-- A very-high-intensity retroreflective sheeting having highest retroreflectivity charac- teristics at short road distances.

Note 1 -- All retroreflective sheetings. Certain applications may require the use of a particular product within a particular type in order to achieve a desired level of retroreflectivity in a given situation. In these cases, information concerning additional performance characteristics must be obtained. The backing required for retroreflective sheeting Types I through IX shall be classified as follows; Class The adhesive backing shall be pressure-sensitive, require no heat, solvent, or other preparation for adhesion to smooth, clean surfaces.

Class The adhesive backing shall have an adhesive that shall be activated by applying heat and pressure to the material. The Class 2 material shall be repositionable under normal shop conditions and at substrate temperatures up to degrees F 38C and without damage to the material. The Class 2 material may be perforated to facilitate removal of air in heat-vacuum laminators, but the perforations must be of a size and frequency such that they do not cause objectionable blemishes when the sheeting is printed.

Class The adhesive backing shall have a positionable low-tack pressure-sensitive adhesive that requires no heat, solvent, or other preparation for adhesion to smooth, clean surfaces. It shall be repositionable up to a temperature of degrees F 38C without damage to the material. Class This shall be a nonadhesive backing made of material commercially used for self-supporting products such as traffic cones, temporary roll-up warning signs, and post bands.

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ASTM D4956

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ASTM D,. 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. This specification does not address inks, overlays, or other imaging methods that may be applied to retroreflective sheeting material to create traffic signs or other devices. Although this specification provides photometric requirements for retroreflective sheeting under evaluation, minimum performance requirements of in-service signs or other devices are outside the scope of this document. The values stated in inch-pound units are to be regarded as standard.

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