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What is Alcoa Alumilite Black 326R1?

Q. Hi, have a client in Mexico; he asked me for black finish anodizing Alcoa 326R1.

At www.anodizing.org/page/alcoa-nomenclature-system can see that R1 is caustic etch, but need to know what coating designation code 326 is. Somebody know it?

Marco Lopez
- Guadalajara, Jalisco, MX
February 29, 2024

A. Hi. Google didn't find it for me, which makes me wary that there might be a typo. When neither the buyer nor the provider know what is wanted, beyond "326R1" and black, sounds like a recipe for an unsuccessful project ... but hopefully someone will know exactly what 326R1 means.

Good Luck, & Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

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