After receiving a chemical pre-anodic treatment, the aluminum components are submerged in an electrolyte containing sulphuric acid. At the metal surface, an electro-chemical reaction take place with aluminum ions and an insoluble aluminum oxide forms. After the aluminum oxide is "grown" to the desired thickness, the work is subjected to boiling water immersion (seal bath) to convert the freshly formed aluminum oxide to a more inert condition.

Designated AA-M10C22A31 (Aluminum Association, mechanical finish unspecified, medium matte etch, Architectural Class 2, 0.4 to 0.7 mil (10 um to 18 um) coating in accordance with Aluminum Association finish standards.

Produces the clearest and best general purpose anodic film. Accounts for more than 90% of all anodizing done in the world today. Easiest finish to control.

Most economical of all anodic finishes.

Clear

Colour deviations will exist but will not exceed the established limits for this finish.

Electrolytically Deposited Colour is produced by controlled electrochemical oxidation.  A minimum of 0.7 mil (18 um) thick, the dense, hard anodic coating literally "grows" out of the metal itself.  The colour is generated by depositing tin at the base of the anodic pore.  The more tin salt that is deposited, the darker the colour.  The work is then immersed in a bath of boiling water to seal the anodic film.

Designated A44 (Architectural Class 1, not less than 0.7 mil (18 um) thickness in accordance with Aluminum Association finish standards.

Produces attractive colours without the use of dyes or pigments. Colours are stable and lightfast. Although Alumanodic II provides greatly improved uniformity of anodic colour, absolute colour match should not be expected.  As with colour finishes on any material, the acceptable range should be established with samples approved by the Architect. It should also be recognized that there is a variation in appearance between sheet and extrusions since each product has its own anodizing and surface characteristics.

The dense anodic coating produced provides excellent resistance to corrosion and abrasion.  An intrinsic feature of Alumanodic II is the apparent variation in tone that occurs both from the movement of shadow across a surface and from changes in light. The changing visual impressions, uniquely characteristic of anodizing, are dynamic and constantly refreshing.

Standard colours -light bronze, standard bronze and black. Other colours are available on a special enquiry basis.

Colour deviations will exist but will not exceed the established limits for this finish.