What is tourmaline powder and what are its main uses?
Tourmaline powder is a fine mineral powder composed of tourmaline (a borosilicate mineral), featuring unique piezoelectricity, pyroelectricity, and the ability to release negative ions. It is widely used in water treatment,cosmetics (to enhance skin absorption), architectural coatings (negative ion-functional paints), textiles (anti-static and antibacterial fabrics), and electronic materials (piezoelectric components).
Which regions are the main exporters of tourmaline powder?
The main exporting regions include China (abundant high-quality tourmaline reserves and mature processing capacity), Brazil (rich in colored tourmaline resources), Sri Lanka, the United States, and India. These areas dominate global supply due to their superior mineral quality and advanced powder processing technologies.
What quality standards should I pay attention to when importing tourmaline powder?
Key parameters include: particle size distribution (D50=1-10μm for common grades, ultra-fine grades <1μm), boron trioxide content (≥10% for high-purity products), negative ion release amount (≥1000 ions/cm³), color uniformity (consistent for colored tourmaline powder), and heavy metal content (compliant with EU REACH regulations). Certifications like ISO 9001 or industry-specific testing reports may also be required.
How is tourmaline powder packaged for international transportation?
It is usually packaged in 25kg vacuum-sealed aluminum foil bags or woven bags with inner plastic liners (to prevent moisture absorption and maintain activity); for large orders, 500kg/1000kg bulk bags are available. It is critical to mark product specifications (e.g., particle size, grade), batch numbers, and safety labels (e.g., "non-hazardous goods", "keep dry") on the packages.
What are the common trade terms in tourmaline powder trade?
Common terms include FOB (Free On Board), CIF (Cost, Insurance and Freight), and EXW (Ex Works). The selection depends on negotiations between buyers and sellers regarding transportation responsibilities, cost allocation, and risk transfer (e.g., moisture damage risks during transit).
What documents are required for importing tourmaline powder?
Required documents include commercial invoice, packing list, bill of lading (B/L), certificate of origin, and quality inspection report. For tourmaline powder used in cosmetics, additional compliance certificates (e.g., FDA approval for cosmetic-grade products) may be needed in some regions.
What payment terms do tourmaline powder suppliers commonly accept?
Suppliers usually accept letters of credit (LC), telegraphic transfer (TT), or secure payment platforms (e.g., Alibaba Trade Assurance). The standard practice is to prepay 30% as a deposit, and the balance is paid before shipment or against the copy of the B/L.
Can tourmaline powder be customized for specific industrial uses?
Yes, suppliers offer tailored grades based on client needs, such as:
Ultra-fine tourmaline powder (for cosmetics and high-end health products).
Surface-modified tourmaline powder (for enhanced dispersion in coatings and plastics).
Colored tourmaline powder (for crafts and decorative materials).