Iron Oxide Red for Ink
Overview
Iron Oxide Red (Fe2O3) is a synthetic inorganic pigment extensively used in ink manufacturing due to its vibrant hue and durability. It is produced through calcination of iron salts or precipitation methods, yielding fine particles optimized for dispersion in ink systems. As a cost-effective alternative to organic pigments, it offers superior opacity and resistance to fading, making it ideal for long-lasting prints. Its compatibility with various ink bases (water, solvent, UV-curable) further enhances its versatility in the printing industry.
Physical and Chemical Properties
Iron Oxide Red exhibits a hexagonal crystal structure, contributing to its high density and thermal stability. Its insolubility in common solvents ensures minimal migration in ink applications, while its pH neutrality (6-8) prevents reactions with other ink components. The pigment's lightfastness (7-8 on the Blue Wool Scale) and weather resistance stem from its stable oxide structure, which withstands UV exposure and environmental oxidants. Particle sizes typically range from 0.1 to 0.5 microns, optimized for smooth ink film formation and gloss retention.
Main Applications
In the ink industry, Iron Oxide Red serves as a primary colorant for packaging inks (food labels, cartons), security inks, and decorative prints. Its heat resistance makes it suitable for metal decoration inks subjected to high-temperature curing. Beyond inks, it finds use in artist paints, construction materials (colored concrete), and plastics. Recent developments include nano-sized variants for transparent ink effects and functional inks with magnetic properties, expanding its industrial relevance.
Safety and Storage
Classified as non-hazardous under GHS, Iron Oxide Red requires standard industrial hygiene practices. Prolonged inhalation of dust may cause respiratory irritation, warranting N95 masks in powder handling areas. Storage should prioritize moisture control to prevent caking; sealed containers in ventilated areas are recommended. Bulk shipments often use moisture-resistant bags with palletization. Shelf life exceeds 5 years when stored properly, though batch testing is advised for critical applications.
B2B Procurement Guide
Key specifications for ink-grade Iron Oxide Red include: color strength (compared to standard samples), residue on 325 mesh sieve (<0.5%), and oil absorption value (15-25 g/100g). Request certificates of analysis for heavy metal content (Pb <20 ppm, As <5 ppm) to comply with food-contact regulations. Leading manufacturers include LANXESS, Cathay Industries, and Hunan Three-Ring Pigments. Consider regional suppliers for reduced logistics costs, but verify consistent quality through sample testing. MOQs typically start at 500 kg for standard grades, with pricing tiers at 1-ton and container-load quantities.
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