How to tell whether the signature on a football is personal or printed?

The specific identification method of the signature is as follows:

1, observe the ink color. When you take it to the reflective place, you will see obvious ink protruding, and the seal is integrated with the paper itself.

2, clear water identification method: wipe with clear water, the pro-signature can be easily erased, and the seal is intact.

3, strength identification method: the signature is firm, the paper will sink, and the seal will remain flat.