[discussion] out of curiosity for future products, is the brown at the edges just due to how they cut acrylic charm?

this is my first time ever getting acrylic charms done, and I noticed the peel layer having tons of brown smudging at the edge bits - i imagine this is just from cutting it out? it caught me a bit off guard because it honestly look like some kind of brown liquid staining all around the edges but its exclusively just the sticker peel side.

im just curious if this is to be expected or not since some of the peeling videos and such I've seen online dont have that same brown smudging and if they do it seems more faint.

I used zapcreatives - the charm itself is lovely, this is just a curiosity kind of thing lol