Antonio Amato, Caserta, Italy

 This arrived in the mail a few days ago - Oh dear. It's quite beat-up.

There's no postage stamp. I"m assuming it got lost along the way. There is a faint cancellation on the reverse and looks like it's 11 May 2015. Could it really have been on it's way that long?

 Inside was a slightly bent postcard.

There was an explanation of the technique used and a couple of bicycle images.

The technique is interesting and I smiled at the caption.

Thanks for the entry, Antonio, and perhaps you can let us know when this started it's journey.