Signing Mosaics

Someone asked how an artist could sign their mosaic work.
Here's a close-up photo of how I do it

I take a narrow strip of copper and bend it into my initials (which luckily are ones that can be strung together out of a single strip).

I then embed them in the mortar, just like any other tessera.

This idea came from Matteo Randi of the Chicago Mosaic School.