Manganese Drier for Offset Ink (Manganese Octoate)
CAS Number: 8030-70-4
Manganese octoate is a primary metallic drier providing both surface and through-drying activity in oxidatively drying sheetfed offset inks, serving as either a supplement to or low-cobalt substitute for cobalt drier. Mn drier exhibits less tendency toward over-oxidation and yellowing than cobalt, making it preferred in white and light-colored offset ink formulations and in formulations developed to comply with cobalt-restriction regulations.
Technical Specifications
| solvent | Aliphatic hydrocarbons (white spirit) |
| appearance | Dark brown liquid |
| flash point (°C) | ≥61 |
| density (g/mL, 25 °C) | 0.90–1.00 |
| manganese metal content (%) | 6.0 or 10.0 |
Applications
- Low-cobalt sheetfed offset ink drier packages
- White and pastel offset ink drying systems
- Through-drying promoter in alkyd varnishes
- Letterpress and gravure oil-based ink driers
- Compliance formulations under EU cobalt restrictions
Key Features
- Both surface and through-drying activity from a single drier
- Lower yellowing tendency than cobalt in white ink formulations
- Suitable as cobalt-reduction or cobalt-free drier option
- REACH-compliant; meets European ink chemical regulations
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