ASTM C584 – Standard Test Method for Specular Gloss of Glazed Ceramic Whitewares and Related Products
Description:
Significance and Use
4.1 This test method provides a means of establishing specular gloss limits for bright, semi-mat, and mat glazed surfaces. It is realized that specular gloss measurements do not always correlate well with visual rankings of glossiness because specular gloss is only one of several related appearance attributes that produce the sensation of gloss. However, the prescribed test method is of sufficient accuracy for the intended purpose.
NOTE 1: If a greater degree of distinction between bright glazed surfaces is desired, the 20° geometry instrument will provide it.4
Scope
1.1 This test method covers the determination of 60° specular gloss of glazed ceramic whitewares and related products.
ASTM C580