Physical experience 04: Polishing
For the ceramic, a double lapping polishing process was used to give the phone the highest level of polish possible. At less than RA 0.02, the level of polish of the Æ+Y surpasses industry standards. General engineering finish equates to a machine finish of RA1.6 and for example a super polish is RA0.05.
For the metal parts, the high level of polish was achieved with a significant amount of hand-finishing by trained specialists. The resulting brushed finish may have a fine variance between each phone, due to the handmade element of the process.
The contours of the phone, particularly the rear and end caps, have the same high level of finish as the keypad. Achieving this without damaging the edges of the components required very skilful tooling.