a method for manufacturing multiple label - seals is described , wherein a self - adhesive material having a tape , an intermediate adhesive layer , and a liner coupled to the tape via the adhesive layer is fed , at least one first printing layer is printed successively onto a tape region of the tape to form each corresponding label , at least one unprinted tape region of the tape adjacent to the printed tape region is further cut and extracted , at least one heat - shrinkable plastic film is further mounted onto the printed tape region of the tape to form each corresponding seal , and the label - seals are finally cut and separated on the liner by removing skeleton portions of the printed tape region and the heat - shrinkable plastic film adjacent to the label - seals .