What is the identification method of leather case leather when purchasing a mobile phone case?

What is the method of identifying the genuine leather of a leather case when buying a mobile phone leather case? Many people will not be able to dialect the authenticity of a leather case. In fact, there are several ways to identify a mobile phone leather case: The first type: visual smell plus tactile leather The pores and patterns are relatively deep, and if it is leather, the nose smells of leather. Some non-leather will also have this smell in order to fool customers, but the touch is particularly important. If it is smooth and soft, And it must be real leather with elasticity. Even PU leather will have a taste. If you follow the above statement, it is basically real leather. The second type: ignition and water absorption may be a very bad identification method, but it is particularly effective. When the leather is burned, it will have a burning hair smell, and the leather is easy to absorb water. Fake leather cannot be used. To this effect. If you operate according to the above statement, it must be leather, if not, it is PU leather.