Grinding sheet and polishing sheet; Polishing collet, wool plate and polishing paste.
Uncover the polishing sheet.
Stick the polishing sheet to the polishing collet.
The backboard of mobile phone is not contaminated by polishing powder after the completion of polishing.
Stick the wool plate to the polishing collet, and prepare to polish with polishing paste.
Put a few polishing paste on the backboard of mobile phone.
The back of mobile phone has been contaminated by polishing powder after the completion of polishing, which is not accepted by customer.