1/22/2024 0 Comments Ammonia patina copperThe best use for this would probably be on an immobile piece, or it could still impart a great-looking effect to a piece. It looks like it would wear off, though not completely, on a high use item. The patina flakes off VERY easily, especially under the pressure of pliers. However the brass darkened and only had about 60% coverage. The copper wire was completely covered in the green patina, as well as the bronze. (1 application means spraying and then waiting a couple of minutes.) It took over 10 applications for me to get decent accumulation of green on the metals. Method of use: You can dip the items to color into the solution, or you can use a spray bottle (recommended). The ammonium chloride may take some time to dissolve, warmer water will speed this up. ![]() This recipe comes from The Complete Metalsmith, by Tim McCreight.īe careful of the ammonia - the fumes are particularly noxious.ġTbĚmmonium Chloride (NH4Cl, also known as sal ammoniac) Society for Creative Anachronisms (SCA)Īpplication of this solution to copper containing metals will form a green patina on them, the same color as the Statue of Liberty (for the same reasons).They cannot be turned off as the website would not function correctly without them. These cookies are necessary and essential to the workings of the website when you are logged in. Our membership services are through Membershipworks and they use cookies to provide the service to you. If you want to see more information about your IP address click here to find your IP and click here to find out what your IP address shows about you. This is collected from your IP address, which locates you within an area and doesn't contain any personal information about you. We use Google Analytics to track what pages you visit to help us better understand what is of interest to our visitors. For example if you like to save your username and password when logging into your member account then this is saved as a cookie. This website uses cookies so that we can provide you with the best user experience possible.Ĭookie information is stored in your browser and performs functions such as recognizing you when you return to our website. It can be sealed using Renaissance Wax (see below). The metal may have developed a crusty surface so rinse well under running water to reveal the patina. When you remove the lid, stand well back as the vapors from the ammonia in the enclosed space are very potent and will irritate eyes, nasal passages etc. Put a small open container of household ammonia into the container and put the lid on. Put your pieces in the bottom and sprinkle with vinegar and then salt. How-To: to fume pieces, find a container – glass or plastic – with a tight lid. Please search the internet for more complete instructions if you want to try these methods. You can replicate this look on jewelry or sculpture using vinegar and salt and then fuming with ammonia or use a commercial preparation like Tiranti Cupra, or Jax Green Patina. Using a brush may be a safer method than dipping your work.Ĭopper, bronze, and brass naturally form a vibrant green patina called Verdigris. While it is not commercial strength, it is an acid and will sting if you have a cut on your hands. Once the neutralizing process is finished, any remaining baking soda liquid can be poured down the drain.Ĭaution and common-sense safety measures should always be taken when working with this product, but the solution sold for jewelry making is relatively safe to work with. Drop in the patinated work and let sit for a minute or two. How -To: Heat water in a bowl and add baking soda until it no longer dissolves. Neutralize the acid remaining on the metal by dipping it in a warm water and baking soda bath. ![]() ![]() It creates a deep black patina immediately, and can either be brushed onto the metal, or decanted into a larger, all plastic container for dipping (it will corrode metal parts). Hydrochloric acid should be applied to room temperature metal right out of the bottle. Applied with a steel brush they will also darken gold. They can all be used to add a rich, black, antiqued look to both fine and sterling silver. Hydrochloric acid is sold under the trade names Gosiba, Blackening Agent, Black Max, Jax, and others.
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