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ASTM D1003 Haze and Luminous Transmittance of Transparent Plastics
ASTM D1003 is a test method that determines the specific light transmitting and wide-angle light scattering properties of planner sections of materials such as transparent plastic. ASTM D1003 test method is generally applicable to planar sections of materials such as transparent plastics. he results obtained by ASTM D1003 are specially used for quality control and specification purposes. ASTM D1003 has two test methods A and B. Read more about ASTM D1003 Haze and Luminous Transmittance of Transparent Plastics below.
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Introduction to ASTM D1003
ASTM D1003 is a test method designed to measure the haze and luminous transmittance properties of plastics. Haze is defined as the scattering of light when it is passed through a transparent material. Haze is the result of the molding process and the surface texture. Luminous transmittance refers to the amount of light that passes through a sample. The results obtained by ASTM D1003 are specially used for quality control and specification purposes.
ASTM D1003 test method is generally applicable to planar sections of materials such as transparent plastics. The haze and transmission measurements are useful for product development, process development, and performance testing. MaTestLab has the best testing lab network in the USA for providing ASTM D1003 test.
ASTM D1003 Test Method
This test method proceeds by specifying the illuminant, observer angle, and reference color for the spectrophotometer. The test sample is inserted into the specimen holder and the readings are taken with the help of a spectrophotometer or the haze meter. Three consecutive readings are taken and the results are then averaged.
Test procedure A
Test procedure A uses a haze meter to measure luminous transmittance and haze. The values obtained in this case are higher and less variable. The haze meter is checked for geometric and spectral requirements. A light source and a photo-detector are used to provide an output proportional to the incident flux. The specimen is illuminated by a unidirectional beam and is placed against the entrance port of the integrating sphere. A series of calibrated haze standards is required for periodic verification of the accuracy of instrumental response.
Test procedure B
Test procedure B uses a spectrophotometer to measure luminous transmittance and haze. The instrument uses a hemispherical optical measuring system with an integrating sphere. Unidirectional illumination with diffuse viewing and diffuse illumination with unidirectional viewing are the two geometries used. Spectrophotometers are computer driven and values for luminous transmission and haze are calculated automatically.
ASTM D1003 Specimens
Specimen details
ASTM D1003 specimens must be solid and uniformly rectangular.
Specimen dimensions
The general sample size for ASTM is 50 mm or 100 mm disk.
Specimen preparation
Specimens are injection molded or cut from molded or extruded sheets or plates.
ASTM D1003 Results
This test method evaluates the percentages of haze, total luminous transmittance, and diffuse transmittance. The specific light transmitting and wide-angle light scattering properties of planner sections of materials such as transparent plastic vary with specimen depth, temperature, atmospheric conditions, and reflectance angle.
Tests related to ASTM D1003
ISO 13468 is similar to ASTM D1003. ISO 13468 covers the determination of total luminous transmittance of planar transparent plastics and colorless plastics by using a double-beam scanning spectrophotometer. The specimen size for ISO 13468 is 10 mm in thickness. The method is applicable for transparent molding materials, films, and sheets. This method is not applicable to plastics that contain fluorescent materials.
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