Silver is a noble metal, which is in great demand in the jewelry market. This is also explained by its unique properties, and cost availability.
Silver decorations are perfectly harmonized with any stovery of precious stones, ideally suited to almost all fair sex representatives. In addition, this Metal type is resistant to various jewelry processing, including the oxidation process. Consider more detailed, which represents this method of changing the appearance of the metal.
What it is?
Silver oxidation is Procedure using special chemicals during which the metal surface is enveloped by a protective film consisting of silver oxide.
As a result of this processing method, the decoration changes the color, becomes resistant to unfavorable external influence.
Oxidized metal processing has two significant advantages.
- The appearance of silver decoration changes dramatically.
- Raised metal resistance to negative impact of the external environment.
Special mortar, in which the immediate oxidation process is carried out, prepares separately. It has a certain expiration date – 24 hours. After the course of the day, the solution is no longer recommended, as it loses its properties. Product processing is performed using chemical fluid heating.
The result of silver color depends on the temperature of the solution: the higher it is, the more saturated the color of the product.
Oxidized silver during processing can purchase One of the 4 possible color coating options: blue, gray, purple or black shade. It all depends on what moment the decoration, subject to such a method of chemical impact, will be extracted from the working solution.
How passes oxidation?
Silver oxidation is a multi-stage process, which includes sequential execution of several stages.
- Preparation of special solutions.
- The silver product is placed in a chemical liquid.
- The heating of the solution is carried out. At the same time, control over the interaction of metal and chemicals included in the working solution.
- After completion of the process and the product is extracted from the solution using a special device made of wood, cooled and is thoroughly washed in conventional water.
To prepare a solution required for metal oxidation, Sulfur liver, which is a mixture of potassium carbon dioxide with potassium sulphide (percentage ratio 1 to 1 or 1 to 2). The listed components are mixed in water to its complete dissolution, and then the resulting solution is heated to a temperature of 80-90 degrees.
Before subjected to silver oxidation, it is necessary carefully wipe alcohol or gasoline. This will degrease it and prepare for the processing process.
If the staining is supposed to be done only on one of a certain area of the product, then with a tampon or tassel, the solution is applied only on this selective area of the treated decoration.
In the case when the color of the entire product is changed, then Silver decoration is immersed in chemical liquid entirely. Successful fixation of the result obtained is possible only with a gradual decrease in metal temperature after oxidized processing.
At the end of the oxidation procedure, the surface of the silver jewelry is treated with chalk and wipe the cloth made of felt. To secure the result obtained, the finished product is polished.
If the decoration is encrusted with precious stones, it is not worth worrying about the integrity of the product during its oxidation.
In the process of processing in a chemical reaction, only metal (silver) comes, and the appearance of the stones will remain unchanged.
In specialized workshops oxidation is carried out through electrolytic deposition. The chemical liquid in which the process of silver processing will be heated only to 18-22 degrees. The dive time of silver into the solution is no more than half an hour. After oxidation, the decoration is dried at a temperature in the range of 60-70 degrees Celsius.
Features of the result
In the course of oxidation, silver decorations pass through Treatment with gray, thanks to which silver acquires a brighter and rich shade. Due to the resulting protective film, new colors appear, which are preserved for a long time.
Polishing allows you to highlight the convex parts of the product, as it is returned to the natural shine, and the concave parts acquire a pronounced dark shade.
The resulting protective layer has an increased level of strength, so silver will be protected from various kinds of adverse effects from the outside. Besides, Thanks to the surface layer, silver will not darken.
Oxidized silver does not need to care. However, in the event of the need to clean the silver decoration, you need to be extremely neat, because the use of brushes can damage the thin protective layer.
Therefore, it is recommended to either use the services of a jewelry workshop, or to make gentle cleansing with a dry napkin and vehicles treated with soap solution.
Unfortunately, over time, the protective oxidized layer has a felt property, so After a certain period of time, the processing procedure is recommended to repeat.
Silver oxidation process See next video.