Because the aniline leather does not cover up any imperfections in the original leather, it must be of very high quality without imperfections to be used to make a leather sofa.
Aniline leather sofas are made from full grain leather and soaking it in a drum to dye the leather. The leather is then used to create the aniline sofa without any other treatments to alter the look of the leather.
This makes it so the leather used for the sofa for sale can breath. Over time and with proper care an aniline leather sofa will develop a patina. Any stains will be absorbed into the leather over a short time and will not be noticeable.
Aniline leather sofas are some of the strongest leather sofas available since they are made with full grain leather rather than the lesser quality split leather that is sometimes used to make inexpensive leather furniture.
However, they do need to be properly cared for. As this is natural leather, you do not want to use any liquids on the leather. If you should spill something, just blot with a clean dry cloth to remove as much as possible of the spill and then leave it alone to be absorbed into the leather.
You want to keep your aniline leather sofa out of the sun and away from direct heat in order to protect the leather from drying out or fading. You do not want to use anything on your full grain sofa that contains oil, wax, or silicone as this will damage it.