Standard Test Method for Reflection Haze of High-Gloss Surfaces

Importancia y uso:

5.1 Measured gloss values of specimens depend on the angle of illumination, refractive index of the material, and the geometric distribution of the reflected light.

5.2 Haze is produced by irregularities in the reflecting surface that affect the distribution of flux reflected around the specular angle. The procedures specified in Test Method D523 are not designed to measure reflected-flux scattering characteristics of high-gloss finishes, particularly where specimens having different surface refractive indexes are being compared.

5.3 In this test method, values for reflection haze are obtained from two measurements of specular gloss, one made with a large receptor aperture and the other made with a small receptor aperture. The geometric conditions have been chosen to permit the use of glossmeters that provide 60° specular gloss measurements (large receptor aperture) and 20° specular gloss measurements (small receptor aperture) as specified in Test Method D523.

5.4 An additional method for the measurement of reflection haze is given in Test Method E430.

Subcomité:

E12.03

Referida por:

E0179-17R22, D5767-18R23, D0523-14R18, D5382-02R17, D0523-14R18, D0523-14R18

Volúmen:

06.01

Número ICS:

87.040 (Paints and varnishes)

Palabras clave:

haze; high gloss; reflection haze ;