Buzz
When copper reacts with oxygen in the air, copper oxide (CuO) forms, creating a greenish layer on the copper's surface that many people appreciate for its vintage look. If left naturally, copper can take many years to develop this layer, called verdigris patina, especially in dry climates. However, if you'd like to accelerate the process and achieve this effect overnight, it's quite simple to do. You can use common household materials rather than harsh and harmful chemicals.
Steps
Preparation
Clean the entire surface of the item with a lint-free cloth. To achieve the desired result, the copper surface must be free from oils and other dirt, which means you should spend some time wiping the item clean before starting the aging process. For the best results, make sure to clean every part of the item, including the small crevices.
Preparing an aging solution for copper. To age copper quickly, the best method is to use a solution made of 1 cup (240 ml) white vinegar, ¾ cup (180 ml) household ammonia, and ¼ cup (60 ml) table salt. Mix these ingredients in a spray bottle for easier use. Shake the bottle to dissolve the ingredients.
- For optimal results, it's recommended to use iodine-free table salt. Regardless of the type of salt you use, ensure it is completely dissolved to avoid scratching the copper.
- Some recipes for aging copper may include adding ¼ cup (60 ml) lemon juice to the mixture. If using lemon juice, the amount should be equal to the total volume of the ingredients mentioned above.
Spray glass cleaner on the copper item. After dusting off the surface, clean the copper piece with a glass cleaner that contains ammonia if possible. Spray a thin layer and then use a cloth to wipe away dust and grime.
- Spray another layer of glass cleaner, but this time leave it wet. This step helps break the surface tension and allows the aging solution to directly contact the metal.
Aging copper items
Apply the copper aging mixture to the item. After cleaning and spraying the glass cleaner, apply the aging mixture to the entire surface of the copper item. Make sure to cover all corners and small crevices evenly.
- You don't need to soak the item with the solution, just wet it enough to cover the surface evenly without drips.
Cover the copper item. To maintain humidity, it is common to place the copper item in a plastic bag or cover it with a plastic sheet to create a humid environment during the aging process. Let it sit for about an hour.
- If you live in a high-humidity area or it's a rainy, damp day, you may not need an artificial humid environment. Generally, this step works best during the wettest season of the year, as you can take advantage of natural humidity.
Reapply the solution. Take the item out of the plastic bag and apply the aging solution to the metal surface once again, making sure to cover it completely. Return the item to the bag or cover it to retain moisture and leave it overnight.
Continue applying the solution if desired. The color intensity of the item is up to you. Take it out each morning to check its progress, and if needed, apply more solution. Repeat the process if you want a darker hue.
- Generally, you probably don’t want to keep applying the solution for too long, especially if you live in a humid climate. Keep in mind that copper will naturally age over time, so you don’t need to overdo it to achieve the desired effect.
Wipe the item with a clean cloth. Once the item has reached the desired aged look, spray a little glass cleaner on a cloth and use it to wipe away any remaining solution, then return the copper item to its place.
Tips
- For items that are smaller or larger, simply adjust the ingredient ratios to ensure you have enough solution.
- Once you know how to age copper, feel free to experiment with different techniques. Before applying the oxidizing solution, you can cover certain areas with paper or tape to create unique patterns on the item’s surface.
Warning
- Only use ammonia products outdoors or in well-ventilated areas, as the gases produced from the mixture can be harmful.
Things You Will Need
- Glass cleaner solution
- Lint-free cloth
- Lemon juice (optional)
- Household ammonia
- Vinegar
- Salt
- Plastic bag
