Eyeliner Pen

The gel eyeliner pen tip needs to be fine or pointed for precise lines, especially for the outer corner of the eye. Also, the tip should be easy to use for applying color.
Today’s eyeliner formulas are sweat-proof and long-lasting, so compliant materials must be used for the container to prevent chemical changes in the formula.
While a smaller capacity may reduce cost, it results in a pen that is too thin or too short, making it uncomfortable to hold and not long-lasting.

Eyeliner pen packaging boxes or bags protect the product from dust, but more importantly, they enhance brand influence.
When promoting a product initially, pairing the refillable eyeliner pen with color-coordinated packaging and adding texture details to the logo and materials creates a beautiful and unique design that attracts attention.
For packaging boxes with inner linings, adding easy access features or gift designs can improve the user experience, which positively impacts consumer purchasing decisions.

Texture Difference

Cosmetic gel pens are typically filled with thick, paste-like or semi-solid liquids, requiring larger brush tip holes. This makes controlling the liquid flow more challenging.
Liquid eyeliner pens are filled with more fluid, water-like liquids, and their brush tip holes are smaller, with a focus on leak-proofing and air-tightness.

Tip Type
Brush heads are modified based on the liquid texture:

For gel, brush heads made of materials such as bristles, soft rubber, or zinc alloy make application easier.

For liquids, a roll-on ball structure is used to prevent leakage, and the materials are typically plastic or fiber.

Overall, to produce a precision eyeliner pen, the viscosity, brush structure, tip design, and leak-proof requirements of gel and liquid eyeliner pens are different.

Aluminum Eyeliner Pen
Aluminum has a more premium appearance than plastic, so in terms of touch and visual effect, it may feel higher in quality.
The aluminum color is created by chemical dyeing that penetrates the surface, so the color does not fade over time.
In terms of color options, weight, and production cost, it is higher than plastic, and the production time is longer.

Plastic Eyeliner Pen
Plastic is lighter. Most products on the market use plastic, so its market presence is strong.
Plastic colors include injection molding color, spray coating, and electroplating. Although there are many color options, long term oxidation may cause yellowing or discoloration.
Plastic has a very fast production cycle and low cost. It has strong advantages for new brands, companies that need fast restocking, and businesses focused on cost control.

Aluminum and plastic each have different advantages and disadvantages. The choice depends on actual needs. If you are unsure, you can discuss with the Jascopack team.

Jascopack offers both disposable eyeliner pens and refillable eyeliner pens.

Disposable Eyeliner Pen
The internal structure pushes the liquid to the tip by twisting or clicking. This mechanism is not reversible. Otherwise, air may enter and cause leakage.

Refillable Eyeliner Pen
After the liquid is used up, remove the brush tip and use a tool to push the dispensing structure back to the bottom. After refilling, the sealing performance of the refillable eyeliner pen does not change.

Shelf life after filling depends on formula and sealing performance of the eyeliner pen packaging. Once opened, an eyeliner pen typically lasts 3-6 months. Before opening or during non-use, factors like oxidation, light exposure, and dust contact can affect the formula. How can these be solved?

Oxidation
The most critical issue is when the pen cap is loose or the brush leaks. These problems are due to poor sealing. A well-sealed waterproof eyeliner pen blocks air contact to prevent oxidation.

Light Exposure

Aluminum or injection-molded color cosmetic pens can block light and UV rays. However, for transparent plastic pens, surface treatments such as spray painting or electroplating should be applied to create a barrier.

Dust
Handling or touching the pen with your hand or skin can cause contamination, leading to bacteria or dust in the product. A good air-tight structure inside the pen, or special beads that seal the liquid, prevents any contact with the formula.

An empty eyeliner pen must protect the formula well to ensure safety and quality.