The pattern of the PU leather is made from fancy paper that heat sticking on the semi-finished leather and then separate the leather from the paper when it cools.

And tests showed that there are considerable advantages for aluminium triformate in area yield, area weight, firmness properties and ageing stability.

It shows that unhairing by microbial enzyme can reduce the pollution of leather making process and improve the leather quality. Also it is good to people's health.