Dragon Coating Limited (DCL) is a diversified company that brings innovation
and services that provides customised solutions in a wide array of vertical markets,
including watches, jewellery, daily consumer goods and even housewares.
DCL “Dragon Sapphire Coating” (DSC) provides an ultra-thin utmost protection layer (up
to Mohs 9) on metal substrates at an affordable cost, while virtually eliminating abrasion
DCL is committed to advancing photonics and sustainable technologies and
business practices to meet the needs of brands and manufacturers. Backed by
unparalleled expertise in optical physics, metal and material science, we apply
environmentally friendly technologies with the Physical Vapour Deposition (PVD) technique
and we develop products in almost every industry to protect our customers’ belongings.
Physical Vapour Deposition (PVD):
Physical vapour deposition (PVD) is a standardised, mature industrial method
that produces a thin layer of materials onto some substrate surfaces, such as glass, metal,
plastic and so on. This thin layer of materials is normally manufactured in a chamber of
high vacuum in a clean laboratory environment.
There are various ways of producing PVD materials, such as through heating
and vaporizing the target sources. The method we use is referred to as "sputtering",
which "sputters" the target materials to the substrate surfaces by means of plasma. Even
though plasma may heat up the substrate surfaces, the entire sputtering system can be kept
at room temperature with maximum temperature not exceeding 35 ºC, which provides an ideal
environment for materials sensitive to temperatures.