Many new, factory and other discs are made with a diamond groove on the front. So the disc plays with a modern look and emphasizes the unique pattern.
We have the equipment with which we can restore the diamond groove during the restoration of the disc!
Why is it actually called a diamond groove? The work is done on a precise CNC machine! Used cutters for cutting aluminum with diamond. Hence the name «diamond groove»
This gives a very clean surface with a nice iridescent sheen. After the groove, the disc must be varnished.