2.4 Electricity and Light Therapy in Barbering

Section 2.4: Electricity and Light Therapy in Barbering

Barbers use electrical appliances daily, including clippers, trimmers, hair dryers, and facial steamers. A solid understanding of electrical safety and electrotherapy modalities is essential to protect clients and staff from electrical shocks, fires, and skin damage. Additionally, using therapeutic currents and light therapy can enhance skin and scalp services, offering high-value treatments.

Fundamentals of Electricity

Electricity is the movement of particles around an atom that creates pure energy. It does not occupy space or have mass, so it is not matter.

• Direct Current (DC): A constant, even-flowing current that travels in one direction only. It is produced by batteries. Devices like cordless climmers and rechargeable trimmers use DC.
• Alternating Current (AC): A rapid and interrupted current flowing first in one direction and then in the opposite direction. It is produced by generators and comes from standard wall outlets. Corded hair dryers, clippers, and towel warmers use AC.

Electrical Measurements

Electrical current is measured using several units:

• Volt (V): Measures electrical pressure or force that pushes the flow of electrons forward through a conductor. Standard wall outlets in the United States operate at 120 volts.
• Ampere (A or Amp): Measures the strength of an electric current. A wire must be thick enough to handle the amperes flowing through it to prevent overheating.
• Milliampere (mA): One-thousandth of an ampere, used for facial and scalp electrotherapy treatments.
• Ohm (O): Measures electrical resistance.
• Watt (W): Measures how much electric energy is being used in one second. A 1000-watt hair dryer uses 1000 watts of energy per second.
• Kilowatt (kW): 1000 watts. Electricity is billed in kilowatt-hours.

Electrical Safety Devices and Rules

Overloaded circuits present serious fire hazards. Safety devices are designed to automatically interrupt the flow of electricity when overloaded:

• Fuse: A device containing a metal strip that melts and breaks the connection when too much current flows through it. Fuses must be replaced once blown.
• Circuit Breaker: A reusable switch that automatically shuts off an electric circuit at the first sign of overload. It can be reset by flipping the switch.
• Ground Fault Circuit Interrupter (GFCI): A fast-acting circuit breaker designed to detect leaks in an electrical current and shut off power instantly. GFCIs are legally required near water sources, such as shampoo bowls and sinks, to prevent shock.
• UL Certification: All electrical appliances must be UL (Underwriters Laboratories) certified to ensure they are safe under normal operating conditions.
• Grounding: Three-prong plugs feature a third, round prong which acts as a safety ground, routing stray current directly to the earth to prevent electrical shock.

Crucial Safety Protocols

1. Never pull on the cord to unplug an appliance; always pull the plug itself.
2. Inspect all cords regularly. Discard any appliance with a frayed or bent cord.
3. Do not attempt to repair electrical appliances yourself; send them to an authorized service center.
4. Never touch electrical appliances or outlets with wet hands or when standing on a wet floor.
5. Always turn off and unplug appliances before cleaning or disinfecting them.

Electrotherapy (Modalities)

Electrotherapy is the use of electrical currents to treat the skin and scalp. The currents used are called modalities. An electrode (or applicator) is used to direct the current from the machine to the client’s skin.

1. Galvanic Current

Galvanic current is a constant and direct current (DC) that uses a positive and negative pole to produce chemical changes when passed through the tissues of the body.

• Desincrustation (Negative Pole / Cathode): An alkaline reaction that emulsifies and liquefies grease deposits and sebum in the hair follicles. It is used to deep-clean oily skin before extractions.
• Iontophoresis (Positive Pole / Anode): The process of introducing water-soluble products into the skin using electric current. It tightens skin, closes pores, and calms nerves.

2. Tesla High-Frequency Current (Violet Ray)

Tesla high-frequency current is a thermal current with a high rate of oscillation used for scalp and facial treatments. It stimulates circulation, increases glandular activity, and provides germicidal action.

• Direct Application: The barber applies the glass electrode directly to the client's skin, moving it slowly in circular patterns. This is used for germicidal effects on acne.
• Indirect Application (Client-Assisted): The client holds the electrode in their hand while the barber performs a manual massage on the client's face or scalp. The current flows from the machine, through the client, to the barber's hands.
• Electrode Gases: Glass electrodes contain gas that glows under current. Neon gas glows with a warm red, orange, or pink light, used for sensitive or aging skin stimulation. Argon gas glows with a violet or blue light, used for oily or acne-prone skin due to its drying effects.
• Contraindications: Do not use Tesla current on clients who are pregnant, have epilepsy, asthma, high blood pressure, pacemakers, or metal implants.

Light Therapy (Phototherapy)

Light therapy is the application of light rays to the skin for the treatment of wrinkles, acne, capillaries, or pigmentation.

• Visible Light: Makes up 35% of natural sunlight.
• Invisible Light: Includes Infrared Light (60% of natural sunlight, produces heat, penetrates deepest, relaxes muscles, and increases blood flow) and Ultraviolet (UV) Light (5% of natural sunlight, produces chemical changes rather than heat, stimulates melanin, and kills bacteria).

Light-Emitting Diode (LED) Treatments

LED devices use specific wavelengths of light to stimulate cellular activity:

• Blue LED Light: Reduces acne and inflammation by killing Propionibacterium acnes bacteria in the pores.
• Red LED Light: Stimulates blood circulation, improves collagen and elastin production, and reduces wrinkles.
• Yellow LED Light: Reduces swelling, inflammation, and improves lymphatic flow.