RO vs. DI Water Requirements for Cosmetic Manufacturing
Question
For a cosmetic factory, should RO or DI water be used?
- In which parts of the process should each type of water be used?
- Is the required equipment or system complicated to operate?
Answer
For a cosmetic factory, the choice between RO (Reverse Osmosis) and DI (Deionized) water depends on the quality requirements of your products. However, DI water is generally recommended for cosmetic formulations.
RO vs. DI Water: Which one to use?
- RO Water (Reverse Osmosis): This process removes about 90-99% of contaminants, including minerals and microorganisms. While it is much cleaner than tap water, it may still contain some residual ions (measured as TDS - Total Dissolved Solids).
- DI Water (Deionized Water): This process removes almost all mineral ions. The resulting water has a TDS of 0 ppm. This is the standard for high-quality cosmetics because the absence of ions prevents unwanted chemical reactions with your ingredients, ensuring the stability, color, and shelf life of the product.
Usage in the Factory
- Product Formulation: Always use DI water to ensure the highest stability and prevent contamination or interference with active ingredients.
- Cleaning/Rinsing: RO water can be used for the initial cleaning of equipment, but the final rinse of containers and mixing tanks should ideally be done with DI water to prevent mineral spots.
Is the system complicated?
Modern systems often combine both technologies into a single unit to make it easier for factory operations. A typical setup involves:
- Pre-filtration: To remove sediment and chlorine.
- RO Membrane: To remove the bulk of contaminants.
- DI Resin: To "polish" the water and remove the remaining ions to reach 0 ppm.
For small to medium-sized cosmetic factories, you can use a compact, integrated system like the water production machine RO+DI water filter, which is designed to produce high-purity water (TDS = 0) from tap water through a 7-stage process. These systems are designed for ease of use and maintenance, with built-in monitors to check water quality (TDS/EC) in real-time.
Recommendation:
If you are setting up a factory, investing in a combined RO+DI system is the most efficient way to ensure your water meets the necessary standards for cosmetic production without the complexity of managing two separate systems.
Relevant Product:
- water production machine RO+DI water filter: A 7-stage filtration system capable of producing DI water (TDS=0) suitable for cosmetic manufacturing.
