One, the first is the way of chemistry, mainly in the specific solution, chemical oxidation is used to form the color of the film, however, require reference to ultimately ensure consistent color, so this way also is common in use.
Second, followed by the high temperature oxidation method, the workpiece must be kept within the scope of the process, then the direct immersion in particular good molten salt, after chemical reaction, can form a layer on the surface of the oxide film thickness consistent, and can present a different color.
Three, the last is ion deposition oxide or oxide way, this way is suitable for use in large quantities of product processing, such as our common band at ordinary times, many watch belt and hand casing is coated with titanium, so basic it is golden yellow color, the main principle is that this way will the artifacts of stainless steel in the vacuum coating machine, again and again by vacuum evaporation plating, however, because of its cost is higher, and the investment is large, so it is not suitable for use in small batch production.
