At this time, we do not test our labels for compatibility with stamp pad ink. For the Waterproof Inkjet labels, the stamp pad ink should still absorb within a short dry time. With the Waterproof Laser labels, you can also test on the product but there may be a longer dry time.
We advise to first test the stamp pad ink on a single label before starting a larger project. Once the ink is dry, you can test the durability by rubbing/scratching lightly to see if this label meets your requirements.