How To Use Midas Black/Brown Patina

Learn to safely add a black/brown patina using Midas solution.

Last edited: 8/31/2018

Midas Black, Brown Patina is great for oxidizing brass, bronze, and copper at room temperature. 

Equipment
Immersion container, racks, hooks, and baskets should be stainless steel, glass, or rigid polypropylene. Black/Brown Patina is an oxidizing solution used to produce dark oxidation on copper, brass, and bronze. Some experimentation with properly prepared work pieces is recommended. Solutions containing 15% to 20% Black/Brown Patina by volume produce black to blackish-brown finishes with an  immersion time of 1-3 minutes. Diluted 5% to 10% by volume solutions produce lighter Flemish and statuary bronzes with 1 to 3 minutes of immersion. Desirable underlying red tones are revealed upon highlighting the brown tones.

 

Process 

1. Thoroughly clean parts with Metal-Kleen. Rinse parts in cool, clean water.

2. Immerse pieces in diluted solution for 1-3 minutes (see above for concentrations). Parts should be agitated for best results. Immersion time longer than necessary may cause the black finish to fade.

3. Remove pieces from the solution and rinse thoroughly in cold water. Dry pieces in either warm air (hair dryer) or in absorbent cob meal, to minimize streaking and staining.

4. Highlighted or relief antique finishes can be produced by buffing, scratch brushing, or barrel or vibratory burnishing.

5. Seal the finish with clear acrylic lacquer, wax, or oil.

 

Safety Precautions 

CAUTION:
DANGER! Contains Phosphoric acid and Selenium. Causes skin, eye, and respiratory irritation. Avoid contact with eyes, skin, and clothing. Avoid breathing fumes. Use ventilation and personal protective equipment. Keep out of reach of children and uninformed adults. Please read MSDS.

FIRST AID:
EYE CONTACT: Flush eyes thoroughly with water for 15 minutes. Seek medical attention.
SKIN CONTACT: Wash area thoroughly with soap and water. Seek medical attention if irritation persists.
INHALATION: Remove victim to fresh air. Seek medical attention.
INGESTION: Seek medical attention immediately. 


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