Q1:The difference between vacuum coating machine and sputtering coating? A: Vacuum sputter coating is more uniform than evaporative coating Q2:Can i visit your factory? A:Yes, welcome to visit our factory, Address: 3988. Tokyo Road Economic development zone Qingzhou city,Shandong province,China (Mainland) Q3:How do you control your quality? A:Each process will be tested by our own inspection department to make sure the product quality.