You may know Lii Lash as a globally trusted lash extensions manufacturer—but have you ever wondered how each eyelash tray is perfected before it reaches you? We take pride in the precision that goes into every handcrafted product. And We're now revealing the behind-the-scenes process that ensures the premium quality you expect.

Our black lash extensions undergo 12 elaborate steps, each carefully designed to deliver consistency and excellence in every tray. Step inside and discover the exclusive production journey at Lii Lash!

The Road to Perfection: Why We Define Our Lash Manufacturing Process with 12 Steps

From raw materials to the final tray, our black lash extensions go through 12 meticulous steps—each one designed to guarantee consistency, safety, and superior craftsmanship. 

Innovation drives our operations forward, but one thing never changes at Lii Lash: our unwavering commitment to precision and quality in every production step. At Lii Lash, we prioritize quality over speed, which means streamlining processes to shorten production time and increase output is never our approach. To uphold this promise, each of our black eyelash trays undergoes 6 meticulous production phases, followed by 6 rigorous quality control (QC) checks, ensuring every product not only meets but exceeds industry standards. These 6 separate rounds of checks minimize the defect rate of each black eyelash extension, delivering an ultimate user experience.

A Step-by-Step Dive into the Art of Lash Extension Production

Click, clock—the golden moment has arrived. We’re lifting the veil on the artistry behind Lii Lash’s black eyelash trays. Step by step, with full transparency, discover how each tray is meticulously crafted and perfected through a series of tightly controlled phases.

Stage 1: Raw Material

Our lash production journey begins with the careful selection and preparation of raw materials—high-grade PBT fibers imported directly from Germany, Japan, and Korea. Each type of lash—whether mink or silk, matte or semi-matte—requires a specific kind of fiber to achieve the ideal finish and texture. Before production, all raw fibers are thoroughly inspected, labeled, and stored in transparent, sealed containers. This step is essential to protect the materials from moisture and contaminants, preserving the integrity and quality of every lash.

Once the lash style is confirmed for production, the corresponding PBT fibers are carefully retrieved and prepared for the first round of quality control.

Strict QC

Although our raw materials are pre-screened, they undergo a thorough inspection once again during the preparation phase. This ensures the material is appropriate, the thickness is precise, and the lash taper meets our standards. Using precision tools such as a specialized eyelash thickness gauge and a ruler for tip length measurement, our craftsmen carefully verify the accuracy of each fiber roll. Any PBT fibers that fail to meet the required specifications are immediately removed from the production line.

Stage 2: Line Processing

After passing inspection, the lashes are evenly spread across a custom lash mold to ensure uniform shape and density. This step is essential for achieving a consistent strip layout—with no irregular lengths and optimal fullness in every tray.

Once positioned, the lashes are secured with specialized sticky tape and carefully trimmed using a precision hammer to remove any excess fibers. Because each lash type varies in thickness and length, different tape types are required. This means our craftsmen must not only be highly skilled but also thoroughly trained to select the right tape for each lash style—ensuring it aligns with both the lash characteristics and the artist’s application techniques.

Strict QC

Welcome to one of the most crucial quality control steps in our production process—the moment that defines the density and value of every Lii Lash tray.

At this stage, the difference between a sparse strip and a full, high-density lash strip is made. Instead of simply laying lashes on the mold and applying tape, our craftsmen meticulously spread the fibers to ensure there are no gaps, even when inspected under light. This careful distribution guarantees maximum lash count and consistent fullness across all strips. Thanks to this precision, each Lii Lash black tray—featuring 16 strips—can contain up to 13,000 lashes, allowing lash artists to serve more clients while lowering the cost per application.

Stage 3: Tube Rolling

In this step, the trimmed lash fibers are wet-rolled around stainless steel tubes of varying diameters and wrapped in paper to prepare for the curl-setting process. The diameter of the tube determines the curl intensity—the larger the tube, the softer the curl; the smaller the tube, the tighter the curl.

Strict QC

Lii Lash uses a wide range of curl-setting tubes—from standard to specialized shapes—to create our 11 distinct lash curls. Since lashes are tightly wrapped around these tubes, the curl quality depends entirely on the tube’s condition. Before each use, every tube is carefully inspected to ensure it’s undamaged and precisely shaped, guaranteeing consistent curls in every tray.

Stage 4: Heat Shaping

The prepared lash curlers are placed in a specialized high-temperature dryer, located in a separate, controlled environment. This heat-setting process locks in the curl, giving each lash a long-lasting shape that can hold for over a year.

At the same time, the heat sterilizes the lashes, ensuring they are safe for both lash artists and wearers. Once fully curled, the lashes are carefully removed and inspected before moving to the next stage.

Strict QC

After heat curling, our lashes undergo a detailed inspection using Lii Lash’s proprietary measuring chart to verify length, thickness, and curl accuracy.

Only lashes that pass this check—free of adhesive residue and featuring a deep black, ultra-dense base that holds up under direct light—are approved to move forward in the production process.

Stage 5: Labeling

Depending on the lash style being produced, graded lash labels with customized card designs are selected and prepared for final assembly. The curled lashes are then carefully placed onto each row of Lii Lash labels and trimmed to precisely match the designated row length.

Strict QC

Each lash is crafted with precision and care, and once all rows in the tray are filled with the quality strips, they undergo a final wipe-down. This step removes any dust or debris that may have settled during production, ensuring the tray is spotless, polished, and ready for packaging.

Stage 6: Packaging Box

As we reach the final stage of production, each completed lash tray is carefully placed into its individual paper box, designed for both protection and elegant presentation. Once boxed, the trays are prepared for shipping, ensuring that every customer receives their lashes safely and within optimal lead time.

Strict QC

All transit packaging is 100% recyclable, ensuring your purchase arrives in perfect condition while minimizing environmental impact.

Now that the entire production journey of Lii Lash’s black eyelash trays has been revealed, we can proudly say that through 12 rigorous and dedicated steps, each tray is crafted with the utmost quality. Every phase—from raw material selection to final packaging—embodies our relentless pursuit of precision, consistency, and excellence.

But this level of care goes beyond quality control; it's about delivering real, lasting value to every lash artist and client we serve. More than lashes—at Lii Lash, we don’t just create products. We build trust, elevate artistry, and deliver experiences that go far beyond the tray.