In the opinion of me.In our production process is unable to control viscosity.If we have a tool, we can measure the viscosity check before shipment.Or, if it is not, we send a check lab outside the room.
In my opinion, the process of production, we can not control the viscosity if we are measuring the viscosity can be checked before delivery , or if we send the check room outside lab.
In my opinion, our production process cannot control the viscosity has if we have a tool measuring viscosity, we can check the first ship if not we send check room lab outside.