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This instrument measure total transmission and haze according to ASTM D1003 (CIE C),

The HZ-1003 transmission hazemeter quantifies the optical qualities of transparent materials. The two most important aspects are:
1. Transmission – a measurement of the total amount of light that passes through a material that is influenced by absorption and reflective properties. In the plastic film industry the transmission measurement is related to the opacity of the material and/or the hiding power of the applied coatings.
2. Transmission Haze – a measurement of the light scattering characteristics of a material. Haze can be due to suspended particles or contaminants within a sample or fine surface texture & contamination. Haze measurement can be used to quantify optical characteristics of plastics and packaging films.