Aluminum Anodizing/

Color Anodizing

Before the sealing stage of anodization, the oxide surface of a metal can be dyed. This is done when the exterior appearance of the product is significant. There are countless dye colors in color anodization. The colors range from light to dark, although lighter colors may be more difficult to manufacture on certain alloys.

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Fort Wayne Anodizing
Fort Wayne, IN
800-347-1030
Fort Wayne Anodizing offers a variety of anodizing services, including aluminum anodizing, hard coat anodizing, conventional anodizing & impregnating services. All laboratory testing, research and development is produced in-house to ensure a high level of quality control. As one of the most sophisticated finishers nationwide & environmentally conscious, we meet the demands of numerous industries.
 
Profile Precision Extrusions
Phoenix, AZ
623-936-5599
Profile Precision Extrusions consistently provides the highest quality anodized aluminum extrusions, shapes and tubing. Coating options include clear or color anodizing, sulfuric anodizing, hard coat anodizing and chemical film (clear & gold). Discover the benefits of our aluminum anodizing processes, extending the life of aluminum and enhancing the cosmetic look of aluminum fabricated components.
 
Mid-States Aluminum Corp.
Fond Du Lac, WI
920-922-7207
Mid-States Aluminum has made a commitment to in-house anodizing services because we understand the added value we can provide our customers by keeping this process a part of our full-service approach to aluminum fabrications. We also understand the importance of managing our process and quality control, as we strive to be an eco-minded partner to our customers and our community. Call us today.
 
Tompkins Metal Finishing, Inc.
Batavia, NY
800-234-2116
At Tompkins Metal Finishing, we offer mid to high volume sulfuric acid anodizing. We do pre-cleaning, etching, deoxidizng, anodizing, dyeing & sealing. We can achieve a wide range of surface finishes from bright to dull matte in clear, black, gold, blue & red. Hard coat anodizing is also available with consideration of aluminum alloy, coating thickness, masking requirements & racking instructions.
 
Hillock Anodizing, Inc.
Philadelphia, PA
215-535-8090
Hillock Anodizing provides the finest precision metal finishing to industry. Our production engineering, quality & management staff are aware of the stringent quality & tolerance requirements your parts must adhere to. We welcome your questions and challenges. Our anodizing processes include hard, clear, color (custom and standard), sulfuric, chromic, hard coat with Teflon® & others.
 
Hardcoatings, Inc.
Charlotte, NC
704-377-2996
From start to finish, we do the job right at Hardcoatings. We are the anodizing specialists. We offer aluminum anodizing, clear anodizing, color anodizing, hard coat anodizing and other metal finishes. We provide friendly assistance to determine exactly what you need among our various services.
 
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Industry Information

Color Anodizing

Color anodizing is a popular process because it allows for the creation of products in a wide range of colors. Such an enhancement of appearance can make a product more appealing to a potential customer. Buyers of color anodized metals should keep in mind the limitations of the color anodizing process, though. For example, some colors fade more easily than others. Black and gold dyes are made by inorganic means; namely they are the result of combining a chemical mixture called ferric ammonium oxalate to an anodized product. This inorganic dye tends to be more lightfast than other colors. Organic colors, which are much more varied, have the downside of being prone to fade. Metallic colors are limited to metallic hues, but remain bright longer then either of the first two processes. Customers should consult professionals before making decisions about the color of their anodized products. What type of product is being produced will also play a part in what color a customer chooses. For example, the architecture industry tends to use mostly metallic color processes, while organic dyes, used in the electronic and construction fields work best with aluminum.

The actual dying techniques vary depending on the dye being used as well as the metal. Some metals do not require the additional step of dying to create a variety of colors. Anodized titanium naturally produces color, what hue depending on the amount of electrical current used to anodize the piece. Many metal accessories such as body piercing studs, wedding rings and costume jewelry are made from titanium. However, the most commonly employed color anodization comes from organic and chemical dyes applied directly after the anodizing treatment. Because anodizing increases the pore size of the chemical body at the surface of a metal, it soaks up and retains color well. Once a metal has been dyed, hot water or steam, often mixed with nickel acetate, is used to seal the surface and to convert the oxide into its hydrated form. This process decreases bleed out and can improve corrosion resistance. Whether the color is a result of the process of anodizing or added, it is just one more reason anodized products are in such high demand.
 

color anodizing
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