The plate inkers lowered a little as they are passing rhe cylinder ga,then strike the leading edge of the plate and bounce,producing a streak on trhe roller that is transferred too the plate.

• 原因是版墨辘经过版圆筒的缺口时，下降少许，更着便装向版头而弹起，造成一条墨痕，这墨痕传往版上，造成墨辘痕。