How ultrasound works, why it's so effective – and how to use it correctly

Professional hygiene is a key quality feature in a nail salon. In addition to clean work surfaces and disinfected hands, the reprocessing of instruments plays a particularly crucial role. Ultrasonic cleaning is a particularly thorough yet material-friendly method.

But what exactly is ultrasound?
How can it remove dirt that is almost impossible to reach with a brush or by hand cleaning?
And why is it particularly suitable for milling bits and delicate metal instruments?

What is ultrasound?

Ultrasound refers to sound waves with a very high frequency, above the human hearing range. While we can only perceive sounds up to about 20,000 Hertz (20 kHz), ultrasonic devices typically operate in the cleaning range between 35,000 and 45,000 Hertz.

These sound waves are inaudible to the human ear – however, they unfold their effect in liquids, for example in an ultrasonic bath filled with water.

How does ultrasonic cleaning work technically?

Inside an ultrasonic device are so-called transducers. These convert electrical energy into mechanical vibrations and transmit them to the cleaning liquid.

The following happens:

1. The ultrasonic waves propagate in the water

2. Microscopically small pressure changes occur

3. This forms tiny gas bubbles

4. These bubbles implode within fractions of a second

This effect is called cavitation.

Cavitation – the key to thorough cleaning

The implosion of the tiny bubbles generates local micro-currents and minimal pressure pulses directly on the surface of the instruments.

This means:

• Dirt is not abraded

• there is no mechanical friction

• even the smallest particles are released from crevices, cutting edges and milling structures

➡️ This is precisely why ultrasound is so effective for:

• Milling bits

• Grooved instruments

• Hinges

• Hard-to-reach areas

And all this without unnecessarily stressing the material.

Why ultrasound is particularly useful in a nail salon

In the nail salon, contaminants arise that are often not visible, but are hygienically relevant:

• fine nail dust

• skin particles

• product residues

• organic residues

These residues often cannot be completely removed by simply rinsing or wiping.

Ultrasound offers clear advantages here:

• uniform cleaning of all instruments

• reproducible results

• time saving in daily salon work

• less stress for sensitive tools

• support for standardized hygiene processes

What ultrasound can – and cannot – do

An important point for correct classification:

Ultrasonic cleaning

• removes contaminants

• is a cleaning or pre-cleaning step

• improves the effect of subsequent disinfection

Ultrasound is not disinfection

• does not reliably kill germs

• does not replace chemical disinfection

• does not replace sterilization

➡️ Ultrasound ensures clean instruments, not automatically germ-free instruments.

The proper place of ultrasound in the hygiene process

A proven procedure in the nail salon:

1. Manual pre-cleaning
   Remove coarse residues

2. Ultrasonic cleaning
   With a suitable cleaning agent

3. Rinsing & Drying

4. Disinfection or Sterilization
   According to applicable regulations

5. Clean, separate storage

This creates a logical, transparent process that is both hygienically sound and controllable.

Which instruments are suitable for ultrasound?

Suitable:

• Milling bits (material- & manufacturer-dependent)

• Metal instruments

• Stainless steel tools

• Glass

• Heat-resistant plastics

Not suitable:

• Glued parts

• Sensitive optics

• Electronic components

• Materials that are not waterproof

⚠️ Manufacturer specifications for the instruments are always decisive.

Cleaning liquid & temperature – often underestimated

The cleaning effect depends not only on the device, but also on:

• the correct cleaning agent

• the dosage

• the temperature

Important:

• Use non-foaming cleaners or cleaning concentrates suitable for ultrasound

• For fresh blood and protein residues, start cold

• Higher temperatures only for stubborn, non-protein-based dirt

Common mistakes in daily salon work

❌ Stacking instruments
❌ Incorrect dosage
❌ Unsuitable cleaners
❌ Too high temperature
❌ Using ultrasound as a substitute for disinfection

✔ Better:

• Place instruments loosely in the basket

• Observe manufacturer specifications

• Define clear hygiene procedures

• Separate cleaning and disinfection

Making hygiene visible – a real trust factor

An ultrasonic device in the salon:

• signals professionalism

• shows a structured way of working

• strengthens customer trust

Many customers are now consciously aware of hygiene – and directly associate clean processes with quality.

Conclusion: Ultrasound used correctly = real added value

Ultrasonic cleaning in the nail salon is:

• technically mature

• efficient

• material-friendly

• an important building block of professional hygiene

Used correctly, it optimally complements manual cleaning and creates the basis for effective disinfection.