A protective green pigment is formed on metals like bronze, brass or copper over time. This verdigris patina that forms after years of weathering is very different from the original gleaming copper color. Such a patina can be created today by using products that speed up the natural process. A wide range of such products are available from many local and online stores.
Burying is one of the oldest methods of creating patinas and some people still use variations of this method today. A technique used in the Middle Ages to speed up the oxidization process was to bury copper strips fastened to a wooden block in some dung for a few weeks. Objects buried in containers filled with an absorbent material like sawdust or kitty litter dampened with chemicals, can result in rich colors and textures.
There were many other methods used in the past to hasten the oxidation process. Some involved placing copper plates in clay pots filled with distilled wine. Another method was to heat vinegar and hang the copper plates over the pot. The green crust formed was used by artists as pigment. All these processes still involved having to wait some time for a result.
It is much easier to create such a finish today. There are many products on the market devoted to this purpose. These products enable a chemical reaction to take place, accelerating oxidation and creating special results. One can never predict exactly what the finished article will look like as various factors affect the outcome and this adds to the appeal.
Applying these products is not difficult but some experimentation may be required to produce the result you are looking for. Some of the factors affecting the results are the chemicals used and the number of layers applied. The type of metal used also affects the color produced. A bluish green is common with copper and a bluish black with bronze.
Some products can be applied without any heat being used. The metal is coated a layer at a time until the required color is achieved. It is applied with a brush or a rag and some products can be sprayed on. If excess product is applied, it can become thick and chalky, flaking off easily. A tip is to use a small amount at a time, applying it from a disposable container.
Products that need heat for application are often transparent. As heat is used the metal pores are opened, allowing the chemical to bond more tightly to the surface. More care needs to be taken, however, when working with hot metal and flammable chemicals. Gloves should be used as well as protective glasses. Ventilation is important when using any chemicals as fumes may be toxic.
This type of finish has become increasingly popular with homeowners as well as landscapers and designers. Statues, pots, doors, screens and many more items can be transformed, infusing interesting color and a touch of aged beauty into designs. They add the allure of something old and worn that has a history or tells a story.
Burying is one of the oldest methods of creating patinas and some people still use variations of this method today. A technique used in the Middle Ages to speed up the oxidization process was to bury copper strips fastened to a wooden block in some dung for a few weeks. Objects buried in containers filled with an absorbent material like sawdust or kitty litter dampened with chemicals, can result in rich colors and textures.
There were many other methods used in the past to hasten the oxidation process. Some involved placing copper plates in clay pots filled with distilled wine. Another method was to heat vinegar and hang the copper plates over the pot. The green crust formed was used by artists as pigment. All these processes still involved having to wait some time for a result.
It is much easier to create such a finish today. There are many products on the market devoted to this purpose. These products enable a chemical reaction to take place, accelerating oxidation and creating special results. One can never predict exactly what the finished article will look like as various factors affect the outcome and this adds to the appeal.
Applying these products is not difficult but some experimentation may be required to produce the result you are looking for. Some of the factors affecting the results are the chemicals used and the number of layers applied. The type of metal used also affects the color produced. A bluish green is common with copper and a bluish black with bronze.
Some products can be applied without any heat being used. The metal is coated a layer at a time until the required color is achieved. It is applied with a brush or a rag and some products can be sprayed on. If excess product is applied, it can become thick and chalky, flaking off easily. A tip is to use a small amount at a time, applying it from a disposable container.
Products that need heat for application are often transparent. As heat is used the metal pores are opened, allowing the chemical to bond more tightly to the surface. More care needs to be taken, however, when working with hot metal and flammable chemicals. Gloves should be used as well as protective glasses. Ventilation is important when using any chemicals as fumes may be toxic.
This type of finish has become increasingly popular with homeowners as well as landscapers and designers. Statues, pots, doors, screens and many more items can be transformed, infusing interesting color and a touch of aged beauty into designs. They add the allure of something old and worn that has a history or tells a story.
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