This is yellowish-green or grey lumps that are soluble in water. Barium sulfide is used in brown patinas
The following is a potential recipe:
Barium Sulfide: 1 ounce
Potassium Sulfide: 1/4 ounce
Ammonia: 2 fluid ounces
Water: 3 to 5 quarts
The procedure involves mixing these ingredients to create your patina solution. The application of this patina results in an immediate darkening of the metal, creating a matte finish. The final color is best left without a preservative, although this is optional depending on the desired effect.
It's important to note that handling chemicals like barium sulfide requires safety precautions. Always work in a well-ventilated area and use personal protective equipment like gloves and safety goggles.
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