u/Professional-Cut6735

Image 1 — Should I be concerned??
Image 2 — Should I be concerned??
Image 3 — Should I be concerned??
Image 4 — Should I be concerned??

Should I be concerned??

It was close to closing so I was doing just little things to kill time and was buttoning these tank tops. As I was I found a red splatter pattern on the back side of the button and figured maybe something got on the one button...Nope! It was on every single button. I looked at the other tank tops and they have the same red stuff on the back of the buttons. What is it???