ASTM D1003 (Haze and Luminous Transmittance)

ASTM D1003 is a standardized test that measures how much a transparent or semi-transparent material, like plastic or glass, allows light to pass through and how much it scatters or causes haziness. The test quantifies two things: the amount of light transmitted directly through the material (luminous transmittance) and the degree of haze caused by scattering. These measurements help assess clarity and visibility qualities of materials used in lenses, screens, and packaging. Overall, ASTM D1003 provides consistent, objective data to evaluate the optical quality of transparent materials.