■Description

Contaminants appear on the surface or burrs of the seal

■Contributing factors

• Poor manufacturing environment, raw materials, staff, etc.

• The mould is not maintained and cleaned regularly

• Aging or deterioration of artificial rubber

■Recommended improving method

• Indicate the contaminant grade on the package in details, including the manufacture and package

• The mould cannot be used to manufacture the rubber material, with mixed application not allowed