1. Scope of application
This standard prescribes the specifications and test methods applied to flexible reflective membrane material used for road signs.
2. Documents cited
The following reference materials are needed for the application of this standard. For documents cited year of publication, the edition cited applies. For cited documents not recorded in the publication shall be governed by the latest version, including amendments (if any).
TCVN 2101 Paints - Methods for determination of the membrane
ASTM B 209M Specification for aluminum and aluminum-alloy sheet and plate [Metric]
(Technical requirements for aluminum plates and film and aluminum alloys).
ASTM E 308 Standard practice for computing the colors of objects by using the CIE system
(Standard practice using the CIE system in computer engineering on the color of objects)
ASTM E 810 Standard test method for coefficient of retro-reflection of retroreflective sheeting utilizing the coplanar geometry
(Test methods to determine the reflection coefficient of the reflective membrane, using coplanar configuration).
ASTM E 2153 Standard Practice for obtaining bispectral photometric data for the evaluation of fluorescent color
(Standard practice to get the spectral data to evaluate dual-color fluorescence).
ASTM E2301 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
(Method of determining the daytime color characteristics of reflective and fluorescent membrane marker material for high-visibility traffic control and safety for human use standard configuration 45 °).
ASTM G 7 Standard practice for atmospheric Environmental exposure testing of nonmetallic materials
(Standard practice for testing of non-metallic materials in contact with the surrounding environment).
ASTM G 147 Standard practice for conditioning and handling of nonmetallic materials for natural and artificial weathering test
(Standard practice for storage and transportation of non-metallic materials for durability assessment tests weather natural and artificial).
G 151 Standard practice for exposing nonmetallic materials in Accelerated test devices rằng use laboratory light sources
(Exposure standard practice to form non-metallic materials in accelerated test equipment, use of light in the laboratory).
G 152 Standard Practice for operating open flame carbon arc light apparatus for exposure of nonmetallic materials
(Standard practice for operating equipment open flame carbon arc radiation exposure to non-metallic samples).
3. Terminology, definitions
In the standard application of the following terms
Reflective film (retroreflective sheeting)
Thin, flat, soft, transparent, glass particles as a lens or prism, having features reflective evenly on the entire surface. Reflective membrane on the back of the adhesive is coated available to bind to the plate match road signs. Reflective membrane structure is detailed in Figure 1
Figure 1 - The construction of a reflective membrane
Light reflex phenomenon, in which the reflected rays nearly coincides with the direction of projection of the beam to the original features are maintained when changing the projection direction of the original beam.
Reflection coefficient (retroreflection coefficient)
The ratio of the coefficient of luminous intensity of a reflector light on the area of the face. Reflection coefficient denoted by Candelas on lux per square meter (cd.lx-1.m-2).
Luminous intensity coefficient (coefficient of luminous intensity)
The ratio of the brightness of the surface is viewed from a specific location (the lighting in a certain way) and the brightness of the diffuse reflection coated surface (viewed from a similar position).
Axis lighting (illumination axis)
Axis between the light-emitting material and the center of the test surface ... (Cited in TCVN 7887:2008)
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