rolexのインスタグラム(rolex) - 11月11日 23時30分

From extremely thin powder to an almost indestructible ring. Rolex developed an exclusive manufacturing process for its Cerachrom bezel insert. The mixture of powdered chemicals is injected into a mould at high pressure. After a first heat treatment, the upper half of the insert is impregnated with a solution containing metal salts, to obtain the blue colour. It is then fired at up to 1,600° C to harden the component, and reduces its volume while keeping its proportions. Known as sintering, this firing process, during which the ceramic takes on its final colours, lasts over 24 hours. Precision machining with diamond tools gives the piece its final shape and size. Numerals and graduations are coated in one-micron thick layer of platinum via PVD (Physical Vapour Deposition) before a final polishing gives the GMT-Master II bezel a long-lasting lustre.
#Rolex #GMTMasterII #Perpetual

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