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Eyelash extensions: everything you need to know
What are eyelash extensions
Eyelash extensions are a professional beauty treatment that has become increasingly popular in recent years, allowing you to lengthen, thicken and define natural lashes through the application of clusters or individual synthetic lashes onto each natural lash. Many users search for information using terms such as eyelash extensions, lash extensions and lash lengthening, confirming the growing interest in this treatment. If you're looking for more information about eyelash extensions, this blog article is for you!
This semi-permanent method, carried out using a range of products such as primers, adhesives and removers, makes it possible to achieve a more intense and defined look without needing to reach for mascara or a lash curler every day.
Unlike traditional false lashes, extensions are not applied to the eyelid close to the lash line, but directly onto the natural lashes, following their natural growth cycle. This makes the result far more natural and long-lasting. Classic false lashes are removed at the end of the day and can feel less comfortable and less stable, whereas extensions can last several weeks with the right care.
The treatment can be fully personalised according to eye shape, the condition of the natural lashes and the desired result (natural effect, volume, cat eye, doll eye, etc.). Several techniques are available, such as one-to-one (one extension per natural lash) or volume (multiple ultra-fine lashes applied in a fan shape onto a single lash), each with its own specific characteristics and purpose.
Types of eyelash extensions available
Not all eyelash extensions are the same: they differ in terms of curl, length, thickness and material, and choosing the right combination can make the difference between a natural look and a more dramatic one.
The most commonly used curls are C, which offers a gently curved, natural effect; D, more intense and dramatic, ideal for those who want a more open, wide-eyed look; and LC, designed for hooded eyes or very straight lashes, thanks to its straight base and pronounced angle.
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Kalentin offers a wide selection of classic eyelash extensions in a variety of curls, lengths and thicknesses, allowing every professional to find the perfect product to enhance any eye shape.
Regarding materials, it is worth setting the record straight: in the world of eyelash extensions, terms such as silk, cashmere and velvet are often used. In reality, these are not descriptions of the actual composition of the product, but commercial names used to evoke softness and lightness. All extensions on the market, with the exception of those made from real mink fur (which are very costly and now rarely used), are made from hypoallergenic synthetic fibres. Various quality grades exist among these fibres: some are glossier, others more matt; some stiffer, others more flexible.
For this very reason, it is essential to be wary of anyone offering "silk" or "cashmere" extensions without providing any evidence of their composition. The advice is to always request written certification of the materials used, to ensure a safe and genuinely professional treatment.
How the application treatment works
The application of eyelash extensions is a beauty treatment designed to intensify the eyes, increasing the length, curl and volume of natural lashes. Increasingly popular in specialist salons, the treatment is tailored to the client's eye shape, lash structure and desired aesthetic result.
Everything begins with an initial consultation, during which the technician assesses the condition of the natural lashes and guides the client in choosing the most suitable curl (such as C, D or LC), length, thickness and application technique.
The main techniques are divided into one-to-one, where a single extension is applied to each natural lash (including innovative options such as Flat or Semiflat lashes for a light yet visible effect), and volume, which involves applying ultra-fine pre-fanned clusters for a fuller, more intense result.
Now let's walk through the treatment step by step.
The treatment begins with the preparation of the natural lashes: specific under-eye patches are applied to isolate the lower lashes and protect the eye area during the work. The lashes are then cleansed and degreased using a dedicated primer (such as Kalentin's), applied with micro-brushes to ensure a clean surface ready for adhesion. To get the most out of this step, read our complete guide "THE ULTIMATE GUIDE TO EYELASH EXTENSION PRIMER".
After combing through the lashes, the client is asked to keep her eyes closed for the entire duration of the application, as precision tools and accessories such as pointed tweezers are used throughout.
The application itself then begins: each natural lash is carefully isolated using a straight tweezer, before the chosen extension — previously dipped in professional adhesive — is applied on top. Kalentin offers adhesives with different drying times, to be selected according to the lash artist's technique and working pace. Choosing the correct adhesive is essential for the longevity of the treatment and to support the professional's workflow.
For everything you need to know about storing your adhesive correctly, read "HOW TO PROPERLY STORE EYELASH EXTENSION ADHESIVE".
The extension is positioned using a curved tweezer and held in place for a few seconds to ensure perfect adhesion.
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Once the application is complete, the client rests for a few minutes with her eyes closed and patches still in place, while a gentle mist is applied to seal the treatment optimally.
The treatment is not painful, does not damage the natural lashes when carried out correctly, and requires precision, dexterity and the use of professional materials. For this reason, it is essential to seek out qualified technicians who work with safe products and specialist tools, ensuring both safety and hygiene.
Discover our professional eyelash extension kits
How long do eyelash extensions last
The longevity of eyelash extensions can vary considerably from person to person, but on average lasts between three and four weeks. This depends primarily on the natural growth and shedding cycle of the lashes, which, just like hair, follow three phases: anagen, catagen and telogen. When a natural lash falls out, it takes the extension applied to it along with it — this is a completely normal physiological process.
However, several external factors and daily habits can affect the retention of extensions. The main ones include:
- Skin type: particularly oily skin can reduce the adhesion of the glue. The use of a primer is therefore recommended.
- Post-treatment care: using oil-based products or rubbing the eyes will shorten the lifespan of the extensions.
- Quality of the products used: professional, high-quality and lightweight adhesives and extensions adhere better and for longer.
- The technician's expertise: adequate training and correct application are fundamental to good retention and an optimal result.
To maintain an impeccable result, an infill appointment every two to three weeks is recommended, in order to replace any lost extensions and preserve a full, even appearance.
Contraindications and possible side effects
Eyelash extensions are a safe and widely appreciated beauty treatment, valued for their ability to transform the eyes by adding length, volume and definition to natural lashes without the need for daily mascara or a lash curler. However, despite their widespread use, it is essential not to underestimate the delicacy of the eye area.
The treatment does not present any particular contraindications, but may involve some side effects if carried out incorrectly or with low-quality products. Reactions such as irritation, redness or localised discomfort may occur, particularly in clients with sensitive eyes or pre-existing conditions such as blepharitis, conjunctivitis or allergies.
For this reason, it is essential to seek out qualified and certified professionals who are able to:
- carefully assess the health of the eye area prior to treatment;
- select the techniques and materials best suited to the individual client;
- work in clean and safe environments, scrupulously adhering to hygiene standards.
A qualified lash artist will know when it is appropriate to advise against the treatment, ensuring a result that is not only aesthetically impeccable but, above all, safe.
In the event of active eye conditions, irritation or infection, it is always advisable to postpone the treatment until full recovery. Only in this way is it possible to protect the client's eye health and achieve a harmonious, long-lasting and professional result.
FAQ: Kalentin answers
How long does an application session take?
As a general rule, a full eyelash extension application takes approximately 90 to 120 minutes, depending on the chosen technique (one-to-one or volume) and the number of lashes to be treated. Infill appointments are quicker and typically last between 45 and 60 minutes.
How much does an eyelash extension treatment cost?
The price of an eyelash extension treatment can vary considerably depending on several factors, including the technique used, the quality of the materials, the technician's experience and the geographical area.
How are eyelash extensions removed?
Removing extensions is just as delicate a process as the application itself. The safest and most effective method is a professional removal, carried out by experienced lash artists using dedicated removers.
Eyelash extensions vs alternatives such as lash lamination
When looking to intensify the eyes and achieve longer, fuller lashes, there is no shortage of options today.
Among the most popular solutions are eyelash extensions, but also mascara, cluster false lashes and lash lamination treatments. Each option has its own advantages and limitations, and it is worth understanding them in order to choose the solution that best suits your needs.
Eyelash extensions offer a semi-permanent effect, lasting an average of three to four weeks, giving an intense and defined look from the moment you wake up. They do not require daily mascara and allow clients to maintain a polished appearance without make-up — ideal for anyone with little time in the morning who still wants to look put-together at all times.
Cluster false lashes represent a temporary, DIY solution, ideal for events or special occasions. They offer an immediate effect but are not long-lasting.
Mascara remains the simplest and most accessible option: versatile and quick to apply, it suits a daily routine but provides a momentary result and may require touch-ups throughout the day.
Finally, lash lamination is a treatment that works on the curl and structure of the natural lashes, without any external additions. It is perfect for those seeking a natural lifting effect, definition and nourishment, while maintaining a more understated look compared to extensions. If you'd like to explore the differences in more detail, read our dedicated article: "LASH LIFT VS EXTENSIONS: WHICH ONE IS RIGHT FOR YOU?"
Did you know that eyebrow extensions also exist?
Alongside the success of lash treatments, eyebrow extensions are the ideal treatment for anyone who wants fuller, more defined and symmetrical brows without daily make-up. As with lashes, the technique involves the application of synthetic hairs to fill in gaps and redefine the shape, delivering a natural-looking result that lasts up to three weeks.
Would you like to find out more? Read our article "EYEBROW EXTENSIONS: THE COMPLETE GUIDE TO TECHNIQUE, LONGEVITY AND TREATMENT BENEFITS".