Make Your Diamond Earrings Look Brand New

You obtained a pair of exquisite, gleaming diamond earrings a few years ago. However, as you wear them today, you observed that the earrings have lost their sparkle and life. But you remember you took extremely good care of them. You made sure not to get them dirtied. You washed them with mild soap and water diligently.

Well, it turns out that the jewellery is definitely grungy, however you are unable see the dirt. That's because it has developed into a thin film that hinders the light from striking through the diamond or reflecting from the stone. That film coats the metal too, which diminishes the jewellery's lustre. Small pieces of dust and dirt go inside to the blind holes in the metal setting and the stone itself. Furthermore, after mixing with moisture, oil, and salts from your skin, the dirt has dried and crusted like concrete. Needless to say, it is impossible to remove all this gunk even with faithful washing and brushing.

Thankfully, that dirt can be easily removed through a high-tech way called ultrasonic cleaning. Ultrasonic cleaning utilizes ultrasound, usually in the 20 to 400 kilohertz range to make your jewellery neat and tidy. Here's how ultrasonic cleaning works.

The item to be treated is placed in a chamber in an ultrasonic cleaner. The chamber is then filled with an appropriate cleaning solution. Ordinary water can be utilized as a cleaning fluid, but this is not quite effective because of the high surface tension of water. Thus, an aqueous or organic solution is instead used. The cleaning solution has surfactant ingredients that lessen surface tension, basically making the solution "wetter" than water. The recommended cleaning fluid to be used depends on the piece being cleaned. Most cleaning liquids utilized for ultrasonic cleaning are warm, normally around 50 to 65 degrees Celsius. In medical applications, however, the liquid used is normally at a cooler temperature, not more than 38 degrees Celsius, to prevent protein molecules from coagulating.

The jewellery piece is immersed in the solution, suspended so it won't touch the bottom of the chamber. That's because the parts of the jewellery that is not soaked with the fluid are not cleaned. Once the piece is secured, an ultrasonic transducer which is either built into the chamber or lowered into the solution is switched on. The transducer then produces ultrasonic sound waves that change in size in coordination with an electrical signal that is oscillating at ultrasonic frequency.

This action produces compression waves in the cleaning solution which agitate, or "tear apart," the fluid. The agitating action, called cavitation, creates millions upon millions of microscopic voids or partial vacuum bubbles. As the bubbles get attracted to the} jewellery piece, they collapse, or explode, with a massive amount of pressure. Often, the energy released from a collapsing bubble can even reach 20,000 pounds per square inch! However, the bubbles are so tiny that it is impossible for the energy to damage the item. That force is enough to clean and get rid of surface dirt and contaminants such as dust, oil, pigments, rust, grease, algae, polishing compound residue, and others.

The bubbles can also go inside blind holes, cracks, and recesses that can't be reached through normal brushing or polishing. In other models of ultrasonic cleaners, you can also adjust the frequency of the ultrasonic waves. The higher the frequency, the finer the cavitation bubbles, which allow you to clean very tiny details.

Thus, if you want your diamond earrings and engagement rings to be cleaned thoroughly, choose ultrasonic cleaning.

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