colourfast

adj.不退色的；不掉色的

Will this cloth fade? or Is this cloth colourfast? 这种布退色吗?

Will this cloth fade? or Is this cloth colourfast? 这种布退色吗?

This material doesn't shrink and is colourfast. 这种面料洗后不缩水

But I'm not sure whether the silk will be colourfast or not. 但我没把握丝绸衬衣退不退色。

This material won't fade. or This material is colourfast. 这种料子不掉色。