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High thermal stability up to 1000 °C, suitable for high-temperature ceramic and enamel applications.
Excellent lightfastness and weather resistance, ensuring long-term color retention in outdoor exposure.
Non-toxic composition compliant with EU REACH and RoHS directives for restricted substances.
Consistent particle size distribution enabling uniform dispersion and optimal opacity in host matrices.
Chemically inert in alkaline and acidic environments, enhancing compatibility with cementitious and glaze systems.
Ceramic glazes and underglaze decorations for tableware and architectural tiles.
Coloration of vitreous enamels used on steel and aluminum substrates.
Pigmentation of refractory concretes and fireproof building materials.
Staining agent in oxide-based glass formulations requiring stable brown hues.
Functional pigment in high-performance coatings for industrial equipment operating at elevated temperatures.
| Chemical Type | Mixed metal oxide (Fe–Mn–Cr spinel) |
| Product Form | Fine powder |
| Appearance | Brown to dark brown free-flowing powder |
| Primary Applications | Ceramics, enamels, refractories, specialty glasses |
| Key Features | Thermal stability, UV resistance, chemical inertness, heavy-metal-free |
| Benefits | Color consistency across firing cycles, low volatility, no blooming or migration |
| Storage Conditions | Store in dry, cool conditions away from direct sunlight and moisture |
| Compliance | REACH registered; conforms to ISO 17225-3 for inorganic pigments |
Q1: What is the primary chemical composition of HEUCODUR Brown 855?
A: HEUCODUR Brown 855 is a mixed metal oxide pigment based on iron and manganese oxides, engineered for high thermal stability and inertness in demanding polymer processing environments.
Q2: Is this pigment suitable for food-contact plastics?
A: Yes — HEUCODUR Brown 855 is formulated to meet global regulatory expectations for pigments used in food-contact polymers, including compliance with relevant provisions of FDA 21 CFR and EU Framework Regulation (EC) No 1935/2004, subject to final formulation validation.
Q3: How does HEUCODUR Brown 855 perform under high-temperature processing conditions?
A: It exhibits excellent thermal stability, retaining color integrity and chemical inertness during standard polyolefin and engineering plastic processing, including injection molding and extrusion at temperatures up to 300 °C.
Q4: What is the typical dosage range when using this pigment in polypropylene or HDPE?
A: Dosage depends on the desired shade intensity and substrate opacity, but it is typically used at low concentrations — generally ranging from 0.1% to 2% by weight in polyolefin applications.
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