包皮纸 meaning in English

brown packing paper
kraft paper

White fingers and nimble tore at the string and oaoer
白皙的手指轻巧地解开绳子、敏捷地撕开了包皮纸。
Bogus kraft paper
仿包皮纸
Franz took them from barrois and casting a glance at the cover , read : - " to be given , after my death , to general durand , who shall bequeath the packet to his son , with an injunction to preserve it as containing an important document
弗兰兹从巴罗斯的手里把文件接过来，眼光落到包皮纸上，念道：我过世之后，把这包东西交给杜兰特将军，再由杜兰特将军传给他的儿子，嘱其妥善保存，为其中藏有一份最最重要的文件。 ”