Provided is an opening-forming seal that can be easily unsealed into a predetermined opening shape by sticking to a packaging film and peeling a predetermined portion together with the packaging film. An opening formation seal 1 according to the present invention comprises a base material 2 having an adhesive layer 3 formed on a rear surface thereof and a pressing plate 10 disposed at a predetermined position on the base material 2, An opening forming part 4 formed on the outside and a peeling base 5 formed on the inside of the opening forming part 4 and surrounded by the opening forming part 4, the opening forming part 4 and the peeling base 5 are arranged adjacent to each other via a notch 6 formed by forming the opening forming part 4 and the peeling base 5 in a freely separable manner, The pressing plate 10 is formed in a...

You do not currently have access to this content.