請問此句信用狀條款 - 國貿工作討論

"M/S M Mtors,"300,DHA TRUNK ROAD,DEWANHAT,CHITTAGONG,BANGLADESH AND TI
NO. 315-108-xxxx" must either be printed or written in unremoveable ink on
2%(two percent) of the biggest package/wooden box/other packages of the
consignment. A certificate to this effect to be enclosed along with the
documents.
在木箱或其他包裝外面印或用2％的墨水寫出下列字樣："M/S M Mtors,"300,DHA
TRUNK ROAD,DEWANHAT,CHITTAGONG,BANGLADESH AND TI NO. 315-108-xxxx"

其實我不太懂x" written in unremoveable ink on
2%(two percent)的意思

因為我的工廠說他們無法在嘜頭上印上面的資料
只能用貼的
但我又搞不清楚這是啥意思
想要解釋給工廠又不知該如何說 2％的墨水到底是啥阿
能否請各位大大幫個忙 謝謝

--