Copper, Brass and Bronze Chemistry

Stone Chemical Company offers cleaners, brighteners, surface lead removers, and anti-tarnish chemistry for copper, brass and bronze metals.

Anodizing Chemistry

Stone Chemical Company offers additives to improve the anodizing process line in accord with Stone Chemical’s “No Dump Process” Design which specifies that they will not form sludge during use.

Plating Pre-Treatment Chemistry

Stone Chemical Company makes a full line of immersion (dip) cleaners for cleaning all types of plating metals in an immersion tank process.

Stainless Steel

Stone Chemical Company offers three water based products (ST100L, AN130L, and AN115L) for cleaning, brightening, passivating and removing rust from steels.

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If you don’t see the product you need, please give us a call at 630.305.0538

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Looking forward to hearing from you!

Is Stone Chemical ISO certified?

Yes, Stone Chemical Company is an ISO 9001:2015 certified organization.

Why should I use an etch extender?

Stone Chemical AN250L Etch Extender is a proprietary etch extender designed to lengthen etch bath life by allowing dissolved aluminum concentration to reach 180 g/L as against 25g/L without the additive.  AN250L minimizes sludge formation and provides an even matte finish on aluminum parts.

Why should I use an anodizing additive?

Stone Chemical AN350L is a proprietary aluminum anodizing additive designed to increase current density.  This increases anodic coat uniformity and hardness while increasing throughput.

Which additive should I use for extending seal life?

AN590L replaces the organic package in Stone Chemical Company seals which is depleted over time.  It is highly concentrated and requires relatively small additions to prevent smut formation.

What product can be used to extend aluminum rack life?

Stone Chemical AN775 will extend aluminum rack life at least three-fold by removing only the anodizing and not attack the underlying metal.  AN775 can also be used in many cases to remove the anodizing coat from off-spec parts so they can be saved from scrap and re-anodized.

How can metals be cleaned without etching the surface?

Stone Chemical Company offers non-etching alkaline (AN100, AN105LF (Low Foaming), AN110, SW135, SW150L), neutral (AN150L and SW100L), and acidic (AN160L) cleaners for immersion and spray wash applications.

I still have questions, who can I talk to?

If you have questions that are not answered on our FAQ page, please contact us. You can use the quick contact form on our Contact Us page or you can contact us direct by calling during regular business hours at:  630.305.0538. And of course you may contact us via email at

Stone Chemical Company 1300 Iroquois Drive, Suite 135, Naperville, IL 60563
630.305.0538 OFFICE 
630.305.0825 FAX