adj.不退色的；不掉色的

Will this cloth fade? or Is this cloth colourfast? 這種布退色嗎?

Will this cloth fade? or Is this cloth colourfast? 這種布退色嗎?

This material doesn't shrink and is colourfast. 這種面料洗后不縮水

But I'm not sure whether the silk will be colourfast or not. 但我沒(méi)把握絲綢襯衣退不退色。

This material won't fade. or This material is colourfast. 這種料子不掉色。