ASTM D 4890-1998 标准详情
- 标准号:ASTM D 4890-1998
- 中文标题:聚氨基甲酸乙酯原材料的标准试验方法:多元醇的加德内尔(gardner)和apha颜色测定
- 英文标题:standard test methods for polyurethane raw materials: determination of gardner and apha color of polyols
- 标准类别:美国材料与试验协会ASTM
- 发布日期:1998-07-10
1.1 These test methods measure visually the color of clear polyester and polyether liquids. They apply only to materials whose colors have light-absorption characteristics similar to those of the standards. An alternative method is Test Method D1209.
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