Комментарий к картинке, думаю все на английском читают:
The hide is split. Above is the grain split and below the flesh split. Outside the tannery, only the flesh split is recognised as "split leather"
The grain split is considered more valuable. The fibre structure is substantially denser in the upper layer of the grain side and is thus tear-resistant. The grain split is referred to as smooth leather when tanned.
