Ink
Gilsonite and Carbon Black Dispersion
Carbon black is difficult to disperse. Poor dispersion leads to low colour strength and unstable inks. Gilsonite helps.…
Gilsonite in Printing Inks
Gilsonite in printing inks: varnish making, carbon black dispersion, news inks and quality checks.
Ink
Gilsonite for Newspaper (Coldset) Inks
Coldset news inks dry by absorption into porous newsprint, not by evaporation or oxidation. They need good colour…
Ink
How to Make Gilsonite Ink Varnish
A gilsonite varnish is the base of many black inks. Making it correctly ensures clean, stable ink. 20–40%…
Ink
Gilsonite in Printing Inks: Why Ink Makers Use It
Gilsonite has been used in black printing inks for more than a century. It is especially common in…
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Data sheet
Ink & Paint Grade Gilsonite
| Property | Typical value | Test method |
|---|---|---|
| Appearance | Dark brown–black powder | Visual |
| Softening point (R&B) | 150 – 180 °C | ASTM D36 |
| Ash content, max | 3 % | ASTM D3174 |
| Moisture, max | 1 % | ASTM D95 |
| Solubility in toluene, min | 99 % | ASTM D2042 |
| Particle size | 200 – 600 mesh | Sieve |
| Typical dosage | Ink varnish: 20–40 % in oil | |
| Packing | 25 kg paper bags with PE liner, palletized. | |
Typical values. The final specification is confirmed in the COA of each shipment.