BLACK C-22
For Copper and Brass		  

Black C-22 is a concentrated liquid for producing antique color tones on Copper, Brass and Bronze at room temperature. Black C-22 is used primarily for decorative purposes, to produce medium brown, black-brown, to blue-black finishes.

OPERATING CONDITIONS
Concentration: 1 part Black C-22 to 5 parts of water (by volume).
Temperature: 65 to 75 degrees Fahrenheit.
Time: 10 to 60 seconds.
Tank: Acid resistant containers (plastic, P.V.C. or Polyethylene).

Color Formation:

Color formation is dependant upon the time of immersion and concentration of solution. For dark black, dilute the solution with 3-5 parts of water and immersion time should be 1-2 minutes depending on the desired color.

Surface Preparation:

  • Clean the part with Cleaner 104.
  • Rinse with water.
  • Immerse piece in Black C-22 for the necessary time to achieve the desired color. For small parts, stainless steel or plastic baskets should be used and often, simple tumbling is enough.
  • Rinse thoroughly with over flowing cold water, to stop chemical reaction.
  • Brushing or mechanical polishing easily relieves the finish to produce a variety of antique finishes. To produce a uniformly colored finish, tumble or vibrate the parts in sawdust. Large pieces can be wiped dry or buffed.
  • It is recommended that a clear water base lacquer (e.g. WSL-55) be applied to the coating to provide maximum life.

Bath Maintenance:

Since the blackening with Black C-22 is a chemical reaction between the solution and metal surface, the chemical activity will diminish as the solution is used. When the time required to produce the desired color increases, add 5% by volume of Black C-22 liquid concentrate.

Caution:

The Black C-22 is a mildly acidic solution. Avoid contact with the skin or eyes. Protective clothing, gloves and a face shield should be worn when operating. In case of contact flush skin or eyes with plenty of water; for eyes call a physician. Black C-22 liquid is poisonous; do not take internally!

The information stated herein is based on information and tests we believe to be reliable. The accuracy or completeness thereof is not guaranteed. Since conditions of use are outside our control, user shall, before using, determine the suitability of the product for his intended use and user assumes all risk and liability in connection therewith.