How to get mirror surface?

(polishing up to 8k mirror effect;roughness (Ra) is less than 0.1μm)

 

Automactic grinding machine with belt,thousand impeller wheel,cloth wheel.

polishing steps:

grit 80-120-180-240-320-400-600-800-1000-hemp wheel with polishing green-cloth wheel

if cold plate(ex.2B plate) can start from grit 400.

                                 In the last step,the 8k mirror effect can be achieved by adding wax to the cloth wheel