Flexible package is defined as any package made by laminating two or more s of films, and it can be plastic films, lized materials like aluminum foil and flexible materials like paper. Different printing substrates offer different visual appearances and a combination of different materials also results in different product features, such as printability, a high level of barrier protection, resistance to low temperature and medium. Flexible packages are also designed to protect products during transportation, add convenience in handling, increase product’s purchase appeal and communicate information to potential purchasers. Flexible packages are applicable to a wide range of industries like dairy products, food, drugs and electronic products.