800.BUY.COIL
501 East Lake Street
Streamwood, IL  60107		  
 

Defined

 

Anodic Coating Designation System

The chemical finishes and comparative anodic coatings charts are designed as guidelines that match processing and required anodic film thickness for customer needs.

Chemical Finishes

Type of Finish Continuous Coil Anodizers Assn. ALCOA Designations Alum. Assn. Designations Description Examples of Methods of Finishing
(Not Definitive Techniques)
ckn Etched Cleaned N.P.T. (No Pretreatment)   C-10
C-11
C-12

C-1x		 Unspecified
Degreased
Inhibited
Chemical
Cleaned
Other		 Organic solvent treated
Inhibited chemical type
Cleaner used.
To be specified.
Etched Matte
Satin		 R1
R2
R3
C-20
C-21		 Unspecified
Fine Matte		 Trisodium phosphate, 3-6 oz./gal. used at 140-160oF for 3-5 min.
C-22 Medium Matte Sodium hydroxide, 4-6 oz./gal. used at 140oF for 5 min.
C-23 Course Matte Sodium fluoride, 1 1/2 oz. plus sodium hydroxide 4-6 oz./gal. used at 140oF for 5 min.
C-2x Other To be specified
Brightened Chem. Brighten Bright-dipped (R5) R5-Bright Dip*
EB10, EB30
R1-R5
Bright Dip
C-30
C-31		 Unspecified
Highly Specular		 Chemical bright dip solution of the proprietary phosphoric nitric acid type used or proprietary electro-brightening
C-32 Diffuse bright Etched finish C22 followed by brightened finish C31
C-3x Other To be specified

Comparative Anodic Coating Designation

Film Thickness Continuous Coil Anodizers Assn. Designations ALCOA Designations Aluminum Assn. Designations Description Type of Finish
.0001

.0002

.0003

.0004

.0005

.0006

.0007

up
Nonstandard flash (less than .001 film thickness)
Interior commercial standard .0001 to .0002 film thickness
Alumilite 200 .0015 minimum thickness A 21

A 22

A 23

A 2X

 Clear (natural) coating

Coating with integral color

Other

 Protective & Decorative (coatings less than 0.4 mils thick)

(Thickness to be specified by customer)
Architectural Class II .0004 to .0007

Architectural Class I .0007 and up

 Alumilite 204 .0004 minimum thickness A 31

A 32

A 33

A 3X

 Same as Above Architectural Class II (0.4 to 0.7 mil coating)
Alumilite 214 .0006 minimum film thickness A 41
A 42
A 43
A 4X		 Same as Above Architectural Class I (0.7 mil and greater anodic coating

[Anodic Coating Designation System]  [Specifications for Ordering]
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