Hand touch
That is, the surface of the leather is touched by hand, and if it is smooth, soft, full, and elastic, it is the dermis; while the synthetic synthetic leather is generally batt, rigid, and poor in softness.
Seeing
The real leather surface has clearer hair and patterns. The yellow cowhide has relatively fine pores. The yak has thick and sparse pores. The goatskin has fishy scale pores.
Smell
All leathers have a leathery scent; artificial leather has a pungent plastic odor.
ignite
A little fiber is torn off from the back of real leather and artificial leather. After igniting, the pungent smell is made of artificial leather; the scent of hair is not the hard one.