Iron Oxide Red Ceramic Pigment
CAS Number: 1309-37-1
Ferric oxide (Fe2O3, hematite) is the most commonly used red-to-brown ceramic colorant, producing warm earth tones across a wide range of ceramic systems and firing temperatures. At low concentrations (1–3%), Fe2O3 creates tan and amber glazes; at 5–10%, rich iron-red and reddish-brown tones result. In reduction firing, Fe2O3 is partially reduced to FeO, producing celadon and tenmoku glaze effects.
Technical Specifications
| appearance | Red to reddish-brown fine powder |
| purity (%) | ≥99 |
| moisture (%) | ≤0.5 |
| Fe2O3 content (%) | ≥99 |
| D50 particle size (µm) | 0.5–5.0 |
Applications
- Red to brown colorant in ceramic glazes and stoneware bodies
- Iron-red and amber glaze colorant
- Reduction glaze colorant for celadon and tenmoku effects
- Colorant in terracotta and red earthenware ceramic bodies
- Pigment in concrete paving blocks and architectural tiles
Key Features
- Wide range of warm earth tones from tan to deep red-brown
- Reduction-atmosphere responsive for distinctive celadon and tenmoku effects
- Compatible with all ceramic firing temperatures from earthenware to stoneware
- Economical and abundant colorant for high-volume tile and body production
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CAS Number
1309-37-1
Category
Ceramic / Glass AdditivesAvailability
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