UV/LED lash extensions are the newest innovation in the lash industry.
They offer faster application times, superior retention, and enhanced client comfort. With the use of UV lash glue and the UV/LED light, lash technicians can achieve unparalleled precision and durability. They also provide a stronger bond and reduce fumes and sensitivities caused by traditional adhesives.
But, with any new technology comes questions!
In this blog, we answer some of the most frequently asked questions about UV/LED curing systems so you can confidently level up your lash game.
What Are UV/LED Light Eyelashes?
UV light eyelashes are lash extensions applied using specialized UV lash adhesive and cured with the UV/LED light technology.
Unlike traditional adhesives, which rely on air moisture to cure, UV lash glue contains a photo initiator that reacts to ultraviolet light exposure. When exposed to the UV/LED light, the adhesive cures rapidly and evenly, creating a more reliable bond.
1. Why Use a Light to Cure?
UV lash adhesive contains an ingredient called a photo initiator that activates when exposed to the UV/LED light at a specific wavelength (395-400nm).
The photo initiator allows the adhesive to cure instantly, unlike traditional lash adhesives that take time to dry through exposure to air moisture.
Why Does This Matter?
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Traditional adhesives contain 25% more cyanoacrylate, which can take up to 10 minutes to fully cure after lash procedure.
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With the UV light, polymerization completes in 1–3 seconds, providing instant curing, reducing exposure to harmful fumes.
Benefits of UV/LED Curing!
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Faster application times for more efficient appointments.
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The instant curing process minimizes the release of formaldehyde fumes, reducing client sensitivities compared to traditional adhesives.
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Improved lash bonding strength that outlasts traditional eyelash extensions.
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Precision curing process for accurate placement and improved client comfort.
This innovative technology is transforming the lash application process by offering superior retention, better control, and a safer experience for clients who experience sensitivities to regular lash adhesives.
2. Is This a Solution for Lash Allergies?
No adhesive is appropriate for clients with allergies or severe sensitivities to lash adhesives.
Here’s why:
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UV adhesives still contain cyanoacrylate, the primary cause of allergic reactions.
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While formaldehyde fumes are released during the curing process, UV lash adhesives significantly reduce the amount of fumes compared to traditional adhesives.
However, because UV adhesive contains 25% less cyanoacrylate and cures almost instantly with the UV light, it releases far fewer fumes than traditional adhesives. For every 300 parts of formaldehyde released by a traditional adhesive, UV lash glue releases just one part.
Reducing fumes can make this technology a suitable option for mildly sensitive clients.
Bottom Line: While UV curing reduces sensitivity risks, it is not a solution for clients with true adhesive allergies.
3. How Do I Know This Is Safe?
Safety measures are a top priority with UV/LED lash technology.
Here's what makes it safe:
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The 395-400nm wavelength used in UV/LED lash applications falls within the visible light spectrum (UVA) and is sometimes referred to as "purple visible light."
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The UV/LED light emits controlled ultraviolet light that cures the adhesive efficiently but does not penetrate the skin or cause harm.
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Total UV/LED light exposure during a lash session:
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6-8 minutes for a full set
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3-4 minutes for a fill
For comparison: Sitting under a UV lash curing light for 60 hours equals just 60 seconds of natural sunlight exposure.
4. Can My Client See the Light?
Some clients may see the light during the lash application process, while others may not.
Both experiences are completely normal and safe.
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The UV/LED light emits a slight warmth, which most clients describe as a "warm hug."
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Clients sensitive to light may notice it more, but the exposure is controlled and does not cause long-term effects or UV photodamage.
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The human eye is equipped with natural low-molecular-weight compounds that absorb light in the 300-400nm range, providing built-in protection against UV-induced photodamage.
What About Me?
The UV/LED light operates at wavelengths close to the blue light spectrum.
While it does not require safety glasses, some lash artists may experience eye fatigue after prolonged use.
For artists sensitive to blue light, wearing blue light glasses can help reduce eye strain. These glasses are not safety glasses; they filter blue light and provide added comfort during longer appointments.
5. Can I Use Any Adhesive?
No, you can't use just any adhesive with this method.
Traditional adhesives will NOT cure using UV light because they lack a photoinitiator. Without a photoinitiator, the adhesive won't respond to the UV light.
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A UV-curing adhesive is the only type that will work with UV light technology.
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For the best performance, UV adhesives that are designed to work in conjunction with the UV light are recommended.
Bottom Line: No photoinitiator = no light curing. To achieve the benefits of UV lash applications, make sure you're using a compatible UV curing adhesive.
6. What is the difference between UV & LED?
Why do we use both UV & LED when describing the system? The difference lies in their light wavelength, curing process and efficiency.
UV Light wavelengths emits a broad spectrum of wavelengths, including (Ultraviolet) rays, which are invisible to the naked eye. Curing process takes longer compared to an LED system but the UV light interacts with the UV photoinitiator in the adhesive, triggering a chemical rection that cures the adhesive.
LED light emits a narrower spectrum of light, typically focused in the visible range (Ex, 395-405 nanometers, often called "Purple light") with a faster more controlled curing time. More energy efficient and environmentally friendly than UV systems.
Our UV/LED light has LED bulb which gives the precision of LED curing with the benefits of the UV adhesive. We find the system works best when both UV/LED are combined!
Shop the Best Lash Extension Supplies at Lashin Out
UV lash extensions are revolutionizing the beauty industry with faster application times, instant curing, and optimal safety measures.
At Lashin Out, we are committed to providing top-quality lash products for professional lash artists.
We continuously test innovative new products and methods so you don’t have to. You can trust that we always bring you the best and most effective tools to elevate your lash services.
We are currently testing out different brands so that we can bring this technology to our store. Stay tuned for updates!
Shop our range of lash products and discover the future of lash artistry with Lashin Out!
