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1·Blade scratch Paper defect where there is a hair-like indentation in a coated surface running in grain direction. Caused by a particle lodged behind the blade during coating.

顺着纸纹方向，纸面的涂层有着像头发丝的凹痕故障。起因是在涂布时有一颗料积聚在刮刀后面所致。