The technology of the rose gold that is beautiful but easy faded that manufactured the red 18K gold has been spread around for hundreds of years, the principle is simple, that is adjusting the ratio of the 6 copies of other metals that removes 18 from the 24. When adding more Copper, the color will be more red, and when the proportion of copper reduces, the color will change from the red to pink with the increasing of the proportion of silver.

But compared to gold, the copper that produce the color is more active metals, when the case contacts with tap water, sea water, the swimming pool water, salt water or soapy water which are containing the electrolyte and electrochemical reaction occurred in the copper and gold, it will make copper anode corrosion. The actual reaction is very weak, and only occurs on the surface, but the color on the surface of the copper is etching, the beautiful red will fade away. The faded color is evident in the experiments, and when soaked ten days under 40 degrees Celsius in saturated salt water, the color will be dim.

The everrose gold technology of the first generation of the rolex replica swiss in order to let the rose gold color more durable, as early as in September 4, 2003, it has applied for European patent EP1512765, inventors as many as eight people, and the idea at that time was to join the platinum, and on the components to ensure that 75% of 18 k gold, and the copper of 15% to 18% that show red color, and the 0.5% - 4% of platinum that protects the copper. This actually is the introduction of more stable platinum technology principle, because of less amount of platinum, consume of copper is relatively less when contacting the electrolyte brine, thus slows down the color change.