ASTM D4449-2008 标准详情
- 标准号:ASTM D4449-2008
- 中文标题:类似外表的表面之间不同光泽的目视评定标准试验方法
- 英文标题:Standard Test Method for Visual Evaluation of Gloss Differences Between Surfaces of Similar Appearance
- 标准类别:美国材料与试验协会ASTM
- 发布日期:2008
Gloss is associated with the capacity of a surface to reflect more light in some directions than in others. The directions associated with mirror (or specular) reflection normally have the highest reflectances. Gloss is best seen and analyzed when
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