When it comes to lash lamination results, we are convinced that skill alone does not make the difference. Products, protocol, and your in-depth knowledge of both do. InLei®'s Lash Filler 25.9 is not just any kit: it is a system where each product is designed for a precise step and where the order of application has a chemical logic that cannot be improvised. Those who already have a good foundation in lash lamination will recognize many of the concepts that follow: here we go deeper, step by step, with the products involved, processing times, and the attention to detail that truly makes a difference.

The products of the Lash Filler 25.9 protocol: overview

Before delving into the details of individual steps, it is useful to have an overview of the system. Lash Filler 25.9 is not a collection of independent products: it is a sequence where each element prepares the ground for the next. Understanding this logic allows you to work with greater awareness and to explain the protocol to clients with the same clarity.

Why each product is designed for a specific step

The logic of the protocol is simple but rigorous: open, modify, and rebuild. Each product intervenes at a specific phase of this process and is not interchangeable with products from other lines, if you want to achieve the guaranteed thickening and lengthening results. Using the wrong cleanser in the preparation phase or replacing the LASH FORM 1 perm with a generic substance not only produces an inferior aesthetic result: it can compromise the integrity of the hair. You can find all the substances, curlers, and the complete Lash Filler 25.9 Kit in the lash lamination product line, with the option to purchase everything you need in a single solution.

Difference between professional products and consumer kits

We often get this question: "Why not use kits found online?" The answer is in the tests. The professional products of Lash Filler 25.9 have active ingredient concentrations calibrated for salon use, processing times that vary based on hair structure, and efficacy verified by a clinical laboratory in Milan. Tests have shown an average of +25% thickening and 9% lengthening in three sessions (performed approximately 4/5 weeks apart) - a result further enhanced if the client uses the InLei® Adiutrix lash serum daily in the interim.

Absolutely no DIY: these are chemical substances that require attendance at a professional course, because a poorly performed lamination can burn the eyelashes and irritate the periorbital area in a way that is difficult to correct.

Steps 1 and 2: analysis and hair preparation (Mousse and Saline Pretreatment)

Let's start from the beginning, which is also the most often underestimated step. The quality of the entire subsequent treatment largely depends on how well these two preliminary steps are performed. This is not an exaggeration: it is the reality that those who have been working with Lash Filler 25.9 for a long time know well.

Why cleansing is the most underestimated step

We tell you with conviction: analysis and preparation are the step that separates experienced lamimakers from those who get inconsistent results. Eyelashes arrive in the salon with mascara residue, sebum, hairspray, or oily products. If the hair surface is not perfectly clean, the active substances find a barrier between them and the fiber: the final result will be irregular, less durable, or visually uneven. The protocol involves two products in mandatory sequence: first the InLei® Oil Free Mousse to remove makeup and sebum, and then after applying patches (disposable or silicone) to block the lower lashes and protect the skin, thoroughly cleanse with Saline Pretreatment to degrease and prepare the cuticle.

It is very important to carry out a detailed analysis of the structure and porosity of the eyelashes at this stage, in order to correctly choose the processing times during the subsequent steps and thus obtain an optimal result.

Step 3: curler positioning (Fixing Gel and silicone curlers)

This is the moment when the final curl is decided and the shape that the eyelashes will maintain for the following weeks is set. A wrong choice of curler or imprecise lash placement results in a result that does not satisfy the client. Let's see how to proceed with confidence.

How to choose the right curler size

The choice of curler determines the final curl and must be made before starting the treatment, during the analysis of the client's eye. The two variables to consider are lash length and the desired curl. For a harmonious look, the lashes should extend beyond the middle of the curler without reaching the end of the curved part. InLei® offers different lines: "perfect curl" for a more striking doll-like effect, "natural curl" for a natural lift at the root, and universal curlers Forma and Forma UP for varying lengths. Choosing the wrong curler means having to deal with a curl that doesn't satisfy the client: take the time needed for this evaluation.

Lash placement: technique and tension

The Fixing Gel (or Lamica gel for those who prefer a softer adhesive) keeps the lashes adhered to the curler for the entire duration of the treatment. Using a comb like InLei® Helper and a pointed tool like the indispensable Fillering is helpful for achieving correct tension and positioning the lashes parallel on the curler. To work faster, the must-have is a brush with short, semi-rigid bristles like InLei® Tiziano. Whatever tool is used, precision in movements is essential. This is one of the steps where practice makes the biggest difference.

Steps 4 and 5: application of active substances (LASH FORM 1 and LASH FIX 2)

We are at the heart of the treatment. It is here that the hair fiber is opened, reshaped, and set in its new form. The technical competence that an experienced lamimaker develops over time primarily concerns these two steps: reading the hair structure and precise calibration of processing times.

FORM 1: processing times for medium, thin, and thick hair

InLei® Lash FORM 1 is the first perm solution: it breaks disulfide bonds and allows for the reshaping of the fiber. Processing times vary based on hair structure, and this is where lash porosity becomes the decisive variable:

1. Thin and soft hair: 6 to 8 minutes

2. Medium hair (most frequent): 8 to 10 minutes

3. Thick or resistant hair: 10 to 14 minutes

One extra minute on thin hair can lead to fragile or broken lashes. One less minute on thick hair produces an insufficient curl. Reading the hair structure is the real driver of the final result.

FIX 2: the half-time rule

Lash FIX 2 sets the new curl of the lash and closes the structure previously fluidized by Lash Form 1. The operating rule is clear: its processing time is half the time of LASH FORM1 + 1 minute. Adhering to this proportion is essential: without this step, the new curl would not be set.

Steps 6 and 7: tinting, washing, and final nourishment (Developer Cream and InLei® tint, Mousse Magica, Lash Filler 3)

The treatment is approaching its final phase, where the aesthetic result is completed and the hair structure is definitively reconstructed. These last two steps are what distinguish Lash Filler 25.9 from any other lamination on the market and justify the certified thickening data.

Tint and oxidant mixing: proportions and times

The InLei® tint is mixed with Developer Cream 1.5% 5 VOL in a 1:1 ratio. Processing times vary between 6 and 12 minutes depending on the hair type and the intensity of color you want to achieve. It is necessary to apply the color to the entire length of the hair: from root to tip. Once the processing time has elapsed, remove it with a brush.

The final step that is too often skipped

Here comes the most relevant novelty of Lash Filler 25.9 compared to the classic version: nourishment with LASHFILLER 3 Vegan Nourisher, the intelligent wash with Mousse Magica and the sealing with the molecular reconstruction product. Lash Filler 3 should be applied with firm, quick movements. This is the moment when the hair is reconstructed from within: vegetable keratin, Rebalancing Complex, and Biotinoyl tripeptide-1 fill the porosities and increase the fiber diameter. Just a few minutes of processing time for the nourishing serum, and you can directly proceed to washing with InLei® Mousse Magica. It is not just a cleanser: it sets the previously applied products, protects the set curl, and significantly reduces the risk of allergic reactions, shortening the treatment by 15-20 minutes compared to the classic version. It is this step that transforms a lamination into a truly strengthening treatment. As the final step of the treatment, proceed with the clear gel Lash Molecular 4, to be applied with a micro comb. No rinsing is needed.

Maintenance: products to recommend to clients for home use

The in-salon treatment ends, but the care journey does not stop. What your clients do in the hours and weeks following the treatment directly affects the duration and quality of the result. Giving them the right instructions, and the right products, is part of your professional work.

What to recommend in the first 24-48 hours

Post-treatment consultation is part of the service. Always give your clients these precise instructions: no mascara (unless it is gentle and oil-free like InLei Frida), avoid environments with intense steam, do not rub the eyes, and no oily products on the periorbital area. These are not optional tips: the duration of lash lamination depends significantly on these behaviors.

Adiutrix and the post-treatment routine

For long-term maintenance, the product to recommend without hesitation is the InLei® Adiutrix serum. Applied daily for 3 months of cycle, it brings the certified results to +28% thickening and +12% lengthening. This is not an upsell: it is an integral part of the protocol, and clients who use it see better results, return sooner, and with greater confidence. Include the serum in the post-session consultation as standard practice.

Professional lash lamination products on lashINbrow

As you have seen, the Lash Filler 25.9 protocol is a sequence where each product has a precise role and cannot be improvised. In the lash lamination product line you will find all the individual substances, the curlers, and the complete Lash Filler 25.9 Kit. The Academy's certified courses are the path for those who want to learn the protocol with InLei® masters.