Both anodizing and PVD (vacuum coating) technology offer a variety of color options for metal surfaces, but the two work differently, resulting in differences in the color range.

Anodizing: Through an electrolytic process, a hard and corrosion-resistant oxide film is formed on the surface of a material such as aluminum or titanium. The final color can be changed by adjusting the composition of the electrolyte during this process. Common colors include, but are not limited to, silver, gold, black, blue, and green. In addition, the color variety can be further enriched by subsequent dyeing processes.

Anodizing and PVD vacuum coating are both processes used to enhance metal surface properties, but they each have different advantages and application scenarios. Choosing which one is more appropriate depends on factors such as your specific needs, budget, and material characteristics. Here are some comparison points to help you decide:

1. Durability
PVD: In general, PVD coatings are more wear and corrosion resistant than anodized coatings, and can better resist everyday wear and tear.
Anodizing: Although it also provides good protection, it may not be as durable as PVD under extreme conditions.

2. Color and appearance
PVD: Offers a wide range of color options as well as special visual effects such as mirror or matte finishes.
Anodizing: A variety of colors can also be produced, especially after the use of dyes, but its color range may not be as broad as PVD.
PVD: Due to the need for specialized equipment and technical support, the initial investment may be higher.

Anodizing: Relatively low cost, especially for mass production.

PVD: Suitable for almost all metal materials, including stainless steel, titanium, copper, etc.

Anodizing: mainly used in aluminum and its alloys, titanium and other non-ferrous metals.
PVD: is a relatively environmentally friendly technology because it is carried out in a vacuum environment and does not produce harmful emissions.

Anodizing: Chemicals may be used in the process, so the requirements for environmental protection are high.

To sum up, if the pursuit of higher durability and richer color options, while the budget allows, PVD may be a better choice; If you are considering cost effectiveness or the object of treatment is mainly titanium products, anodizing will be a good solution. Of course, the final choice also needs to be determined according to the actual application scenario and personal preference. I hope this information can help you.