Talcum Powder Paper-Making Grade 1250mesh Super Fine for Paper Coating

Product Overview
Our high-purity talcum powder is a naturally occurring hydrous magnesium silicate mineral processed to meet exacting industrial standards. This ultra-fine white powder exhibits a characteristically smooth texture with excellent lubricity, completely free from grittiness or sand content. The product is odorless and tasteless, making it suitable for sensitive applications across multiple industries.

Chemical Composition & Properties

• Primary constituent: Hydrated magnesium silicate [Mg₃Si₄O₁₀(OH)₂]

• Typical composition:

  • Magnesium oxide (MgO): 31.5-32.5%

  • Silicon dioxide (SiO₂): 61.5-62.5%

  • Bound water: 4.5-5.5%

• pH value: 8.0-9.5 (10% aqueous suspension)

• Solubility: Insoluble in water; partially soluble in dilute mineral acids/alkalis

Manufacturing Process

1. Ore Selection: Premium talc ore hand-selected from certified deposits

2. Mechanical Processing:

   • Primary jaw crushing to <50mm

   • Secondary roller milling to <5mm

3. Chemical Purification:

   • Hydrochloric acid treatment (6±1% concentration)

   • Counter-current washing system

   • Neutralization to pH 7.0-7.5

4. Final Processing:

   • Jet milling to target particle sizes

   • Air classification for precise size distribution

   • Quality control certification

Physical Characteristics

• Appearance: Snow-white free-flowing powder

• Particle Morphology: Platy structure with 15:1 aspect ratio

• Particle Size:

  • D10: 2-3μm

  • D50: 6-8μm

  • D90: 15-18μm

• Specific Gravity: 2.78±0.02 g/cm³

• Bulk Density: 0.45-0.55 g/cm³ (loose)

• Moisture Content: ≤0.3% (105°C, 2hrs)

• Whiteness Index: ≥93% (ISO brightness)

Industrial Grades & Applications

Pharmaceutical Grade

• Compliance: USP/EP/JP/ChP

• Key specs:

  • Asbestos-free certification

  • Heavy metals: <10ppm (Pb), <5ppm (As)

  • Microbial limits: TAMC<100 CFU/g

• Applications: Tablet coating, powder bases, surgical lubricants

Food Grade (E553b)

• Certifications: FDA 21CFR182.90, EU E553b

• Purity specs:

  • Acid-soluble matter: ≤0.1%

  • Loss on ignition: ≤5.5%

  • Arsenic content: ≤3ppm

• Uses: Anti-caking agent, rice polishing, chewing gum base

Cosmetic Grade

• Standards: INCI, EU Cosmetic Regulation

• Performance specs:

  • Oil absorption: 40±5g/100g

  • Skin compatibility: Non-irritating

  • Whiteness: L*≥96 (CIE LAB)

• Applications: Body powders, makeup, skincare

Ceramic Grade

• Technical parameters:

  • Fe₂O₃ content: ≤0.8%

  • Fired shrinkage: ≤2.5% (1300°C)

  • Thermal stability: Up to 1100°C

• Uses: Sanitaryware, tiles, technical ceramics

Industrial Chemical Grade

• Key properties:

  • Surface area: 8-12 m²/g (BET)

  • Hardness (Mohs): 1

  • Dielectric constant: 5.5-6.5

• Applications: Plastics, paints, rubber, adhesives

Quality Assurance

• Full traceability from mine to final product

• Batch certification with:

  • XRD mineralogical analysis

  • ICP-OES elemental analysis

  • Laser diffraction particle sizing

  • Microbial testing (for hygiene grades)

• ISO 9001:2015 certified production

• GMP compliance for pharmaceutical grade

Packaging & Storage

• Standard packaging:

  • 25kg multi-ply paper bags (PE lined)

  • 500kg FIBC super sacks (with liners)

• Custom packaging available

• Storage requirements:

  • Temperature: 10-30°C

  • Humidity: <60% RH

  • Shelf life: 36 months

Safety & Handling

• GHS classification: Not classified

• Recommended PPE:

  • Dust mask (N95) for powder handling

  • Safety goggles

  • Protective gloves

• First aid measures:

  • Eye contact: Flush with water

  • Inhalation: Move to fresh air

  • Skin contact: Wash with soap

Technical Support Services

• Application development

• Formulation assistance

• Processing optimization

• Regulatory documentation

• Custom particle engineering

Ordering Information

• MOQ: 500kg

• Sample availability: 2kg technical samples

• Lead time: 2-4 weeks for standard grades

• Global logistics support

This comprehensive technical specification details our premium talcum powder products. For application-specific recommendations or custom requirements, please contact our technical team for expert consultation. Our R&D department can develop tailored solutions to meet your exact formulation needs.

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