Oil paintings are generally not signed on the works. Even if an oil painter signs his name, he often signs it in an inconspicuous place. The color is similar to the background color of the signature, but the depth is different. Others use toothpicks and things like that to sign their names in wet corners.

In the past, most western oil paintings did not leave inscriptions on the picture and back.

Some paintings are not suitable for writing in clear pictures, but painters like to leave their names or are willing to write their names on the back.