Has The Leather Been Dyed All The Way Through?

Has the leather been dyed all the way through? Is the leather drum dyed?

Aniline dyed leather is soaked in a large drum to allow the dye to penetrate all the way through the hide. This is where these terms originate. All aniline dyed leathers are drum dyed all the way through so that is if the top should scratch the layer underneath will be the same color.