Dyed-through leather
Once the leather has been tanned, it’s dyed through completely. This process involves immersing the hide in a dye bath, known as a barrel or drum, which colors it. Leather is often dyed through using transparent aniline dyes.
Sources accessed (April 13, 2023):
- https://www(dot)leather-dictionary(dot)com/index.php/Leather_colour
- https://www(dot)leather-dictionary(dot)com/index.php/Barrel_pigmentation_-_Drum_pigmentation