Alum Leafing Paste

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Alum Leafing Paste is a metallic pigment dispersion composed primarily of aluminum flakes suspended in a carrier solvent or paste medium. It is designed to produce a high-luster, silver-like metallic finish in coatings, inks, plastics, and decorative applications. The aluminum flakes in leafing pastes are specially treated to align parallel to the surface during application, creating a reflective, mirror-like effect. This paste is commonly used in industrial, automotive, packaging, and printing industries where brilliant metallic appearance and surface coverage are essentia

Description

Primary Uses
Paints & Coatings Industry

  • Provides high-reflective silver finish in solvent-based paints and lacquers.

  • Used in protective and decorative coatings for metals, plastics, and wood.

  • Ideal for industrial, automotive, and general-purpose metallic coatings.

  • Enhances corrosion resistance in specific formulations.

Printing & Packaging

  • Used in gravure, screen, and offset printing inks for metallic effects on labels, packaging, and textiles.

  • Creates bright, eye-catching print finishes on paper and synthetic substrates.

Secondary Uses
Plastics & Rubber

  • Added to plastics and rubber compounds to achieve a metallic look.

Arts & Crafts

  • Used for decorative finishes and effects in artistic applications.

PRODUCT KEY ATTRIBUTES
  1. Basic Identification Attributes
  • Chemical Name (IUPAC): Aluminum pigment in paste form

  • Common/Trade Name: Alum Leafing Paste, Aluminum Leafing Paste

  • CAS Number: 7429-90-5 (Aluminum)

  • HS Code: 3212.90 (Pigments in paste form)

  • Molecular Formula: Al (primary component)

  • Synonyms: Metallic paste, silver paste, leafing aluminum paste

  1. Physical & Chemical Properties
  • Physical State: Viscous metallic paste

  • Color & Odor: Silver-gray with a mild solvent odor

  • Melting Point: ~660°C (aluminum)

  • Boiling Point: Not applicable (paste formulation)

  • Density: ~1.3–1.8 g/cm³ (depending on formulation)

  • Solubility: Insoluble in water; dispersible in solvents

  • pH Level: Not applicable

  1. Safety & Hazard Attributes
  • Hazard Class (GHS): Flammable (depending on solvent content)

  • NFPA Ratings: Health 1, Flammability 3, Reactivity 1

  • Exposure Limits: OSHA PEL (Aluminum): 15 mg/m³ (total dust), 5 mg/m³ (respirable fraction)

  • Reactivity: Reacts with strong oxidizers and acids; avoid contact with water in some formulations

  1. Storage & Handling Attributes
  • Storage Conditions: Store in cool, dry, well-ventilated area away from heat, sparks, and open flames

  • Container Type: Sealed metal or solvent-resistant containers

  • Shelf Life: 12–24 months under recommended storage conditions

  • Special Handling: Use spark-proof tools; ensure proper ventilation; avoid static discharge

  1. Regulatory & Compliance Attributes
  • OSHA (USA): Regulated due to flammable solvent content and aluminum dust hazard

  • REACH (EU): Compliant under applicable uses with appropriate safety data

  • Hazard Symbols (GHS): ![Flammable Symbol] 🔥 (if solvent-based)

  • Transportation Restrictions: May be classified as hazardous for transport (UN 1309 or UN 1325 depending on formulation)

  1. Environmental & Health Impact
  • Ecotoxicity: Moderate; aluminum can be toxic to aquatic organisms in high concentrations

  • Persistence: Aluminum flakes are non-biodegradable

  • Carcinogenicity/Mutagenicity: Not classified as carcinogenic

  • Biodegradability: Inorganic and not biodegradable

SAFETY HANDLING
  1. Safety Handling Precautions
  • Wear gloves, goggles, and protective clothing when handling.

  • Use explosion-proof equipment in flammable environments.

  • Ensure adequate ventilation to prevent vapor accumulation.

  • Avoid contact with skin and eyes; wash thoroughly after handling.

 

First Aid Measures

  • Inhalation: Move to fresh air; seek medical attention if respiratory irritation occurs.

  • Skin Contact: Wash thoroughly with soap and water.

  • Eye Contact: Rinse cautiously with water for several minutes; seek medical attention if irritation persists.

  • Ingestion: Do not induce vomiting; seek immediate medical help.

 

Firefighting Measures

  • Fire Hazards: Flammable (due to solvent carrier); aluminum dust may be explosive in air.

  • Extinguishing Media: Use dry chemical, foam, or COâ‚‚; do not use water on burning aluminum.

Special Precautions: Cool fire-exposed containers; wear full protective gear and self-contained breathing apparatus (SCBA).