The Aluminum Association has developed a system of designations for finishes on aluminum. Three specific characteristics of finishes are each individually designated by a letter followed by a two or three digit number. The three finish components this system includes are mechanical finishing (M), chemical finishing (C) and coatings (A). The number which follows each of the above letters describes the type of treatment and appearance desired. Most common category designations are as follows:
When all components of the designation for a desired anodized finish are determined, they are put together in a string beginning with “AA-” to indicate that it is an Aluminum Association designation. For example, a matte champagne finish (AaCron finish #301M) would have the designation AA-M10C22A44.
|AaCron Finish||Aluminum Association Designation|
|101M||AA-M10C22A41 (Also called 215-R1)|
|102M||AA-M10C22A31 (Also called 204-R1)|
|103M||AA-M10C22A212 (Also called 202-R1)|
|201M - 203M||AA-M10C22A42|
|300M - 307M||AA-M10C22A44|
|321M - 366M||AA-M10C22A44A43|
For any bright finish, substitute the C22 with C31, For example, a bright champagne finish (AaCron finish #301B) would have the designation AA-M10C31A44.
Please call us with any questions about this system.
In order to achieve the desired finish on any project, it is of utmost importance to utilize a specification which is specific to the aesthetic and performance standards desired.
For most applications, the specification should read as follows:
Finish: All exposed aluminum surfaces shall receive an anodized finish that is in conformance with Aluminum Association Designation AA-_________1. Color shall be _________2 as furnished by AaCron, Inc., Minneapolis, MN (763) 559-9141. The resulting anodized finish shall be continuous, fully sealed and free of powdery surfaces, blemishes and discoloration. The anodized coating shall meet all standards set forth by _________3.
Notes regarding blank spaces in the above specification
It is also good practice to include information pertinent to aluminum alloy selection in the project specification. The aluminum alloy and its quality have a great impact on the resulting color and appearance of an anodized finish. This statement will vary depending upon material application and aesthetic requirements. AaCron Technical Services personnel are able to easily guide you through this process. Call us at 763-559-9141.
All finish samples produced by AaCron are to serve as a reference standard to identify the color selected by the specifier. The appearance of an anodized finish is influenced by more than depth of color. Other factors include alloy, temper, gloss and surface structure. AaCron disclaims any responsibility or liability and makes no warranties express or implied of any kind in connection with the material and information contained herein.