What is the Standard Dosage for an 18/415 Screw Pump Used in Skincare Packaging?

In the precision-driven world of cosmetic engineering, the choice of dispensing system is critical to the user experience and product efficacy. The 18/415 Screw Pump has emerged as the industry standard for high-viscosity serums, essential oils, and specialized treatment products. Zhangjiagang XinYe Chemical Sprayer Co., Ltd., founded in 2006, operates from three massive production bases covering 100,000 square meters. With a workforce of over 600 experts and advanced full-auto production lines, we specialize in the entire chain from aluminium stamping to automated assembly, ensuring that every pump meets the rigorous ISO9001-2008 quality standards.

1. Defining the Standard Dosage and Output Precision

The "dosage" refers to the volume of liquid dispensed in a single full stroke of the actuator. For an 18/415 Screw Pump, the standard dosage typically ranges between 0.10ml and 0.20ml. This specific volume is engineered to cater to "treatment" products where high concentration requires controlled application. While larger pumps (like 24/410) focus on bulk dispensing, a precision lotion pump 18/415 is designed for accuracy, ensuring that expensive active ingredients are not wasted.

Compared to standard atomizers, screw pumps utilize a spring-loaded piston mechanism to handle higher viscosities without clogging, providing a consistent output regardless of the remaining product volume.

Source: ISO 22715:2024 Cosmetics — Packaging — General Requirements and Standards

2. Technical Specifications of the 18/415 Neck Finish

The designation "18/415" is a technical specification derived from the Glass Packaging Institute (GPI) or Society of the Plastics Industry (SPI) standards. The "18" refers to the nominal diameter of the neck in millimeters, while the "415" denotes the thread style—specifically a taller neck with two full turns of thread. Utilizing a leak proof 18/415 pump for essential oils is essential because the extra thread height provides a superior seal against volatile compounds, preventing evaporation and leakage during transit.

Technical breakthroughs in 2024 have focused on "Low-Force-to-Actuate" (LFA) designs. Industry data suggests that a smooth stroke profile increases consumer perceived value by up to 30% in the luxury skincare segment.

Source: Global Cosmetic Packaging Technical Trends Report 2024-2025

3. Material Compatibility and Chemical Resistance

Skincare formulations often contain essential oils or acidic actives that can degrade inferior plastics. A high-quality 18/415 Screw Pump from XinYe utilizes high-density polyethylene (HDPE) and polypropylene (PP), often paired with an 18/415 aluminum screw pump for serum applications. The aluminum shroud undergoes professional surface oxidization at our headquarters to ensure chemical resistance and premium aesthetics. In contrast to plastic-only pumps, aluminum-clad pumps offer higher structural rigidity and a "cold-touch" luxury feel preferred by high-end brands.

4. Priming and Suction Efficiency

For B2B wholesalers, the "Priming Stroke" count is a key performance indicator. A wholesale 18/415 treatment pump should ideally prime within 3 to 5 strokes. This is achieved through precision-engineered ball valves and dip tubes. For formulations like facial oils, sourcing a small dosage screw pump for facial oils with a high-rebound spring ensures the piston returns to position instantly, allowing for rapid consecutive dispensing without air entrapment.

Conclusion: Engineering Excellence in Every Stroke

The standard dosage of 0.10ml to 0.20ml for the 18/415 Screw Pump is more than just a measurement; it is an engineered balance of user convenience and product preservation. At Zhangjiagang XinYe Chemical Sprayer Co., Ltd., we combine decades of experience with advanced automated inspection equipment to ensure that every pump delivers that exact volume reliably. Located near the Yangtze golden waterway with convenient ground and water transportation, we are positioned to provide global markets with the highest quality dispensing solutions.

Frequently Asked Questions (FAQ)

• Can the dosage be customized for an 18/415 pump?
  While the 18mm housing limits maximum volume, minor adjustments in piston length allow us to offer a cosmetic treatment pump dosage customized between 0.1ml and 0.15ml for specific brand requirements.
• Is the 18/415 pump suitable for high-viscosity creams?
  It is ideal for serums and lotions. For very thick creams, we recommend testing the specific viscosity to ensure the spring return is sufficient for the material density.
• Does the aluminum oxidization affect the product inside?
  No. The aluminum is used as an external shroud; the internal "wetting" parts are made of medical-grade PP and HDPE, ensuring no reaction with the skincare formula.
• What is the standard dip tube length for these pumps?
  As a wholesale 18/415 treatment pump provider, we cut dip tubes to the specific height of your bottle to ensure zero product waste at the bottom.
• Why choose a 415 thread over a 410 thread?
  The 415 thread is taller, offering more contact area between the bottle and the 18/415 Screw Pump, which provides a significantly better leak proof 18/415 pump for essential oils experience.