Linseed Oil (Alkali-Refined) for Offset Ink
CAS Number: 8001-26-1
Alkali-refined linseed oil is a classic renewable vehicle base for sheetfed offset and letterpress inks, valued for its fast oxidative drying, high pigment-wetting capacity, and compatibility with rosin-modified resins and alkyd varnishes. The refining process removes free fatty acids and phospholipids, ensuring consistent color, low odor, and reliable drying performance when activated with cobalt or manganese driers.
Technical Specifications
| appearance | Clear to golden-yellow liquid |
| color (Gardner) | ≤5 |
| viscosity (mPa·s) | 30–80 (25 °C) |
| acid value (mgKOH/g) | ≤3 |
| iodine value (g I₂/100 g) | 170–200 |
Applications
- Sheetfed offset ink vehicle and varnish base
- Letterpress and relief ink formulations
- Lithographic printing ink binders
- Alkyd resin synthesis for ink manufacturing
- Eco-friendly bio-based ink vehicle ingredient
Key Features
- High unsaturation for rapid oxidative crosslinking with driers
- Renewable bio-based ingredient supporting sustainability claims
- Excellent pigment wetting for dense, high-tack offset inks
- Low acid value after refining for stable ink shelf life
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