pokerchips.com chiplabels

[AZnuts]

The labels are printed on a photo-like paper, but they are molded into the chip with a clear vinyl piece over top.

I was able to slice the clear vinyl with a knife then peel it off, but even then the printed label still remained molded to the chip (although a little bit of the color came off with the vinyl)

They seem pretty durable; it takes some dedicated work to damage the label.