1. Gum Rosin WW Grade
High Quality Gum Rosin /Colophony /Colophonium
2. Properties and uses:
It is a kind of natural resin, mainly composed of various kinds of resin acids, it can be dissolved easily in many organic solvents, and has special chemical activity. So it is an important raw material for the production of paper, coatings, inks, rubber, soaps, electronic industrial products, food grade ester gum, rosin ester resins etc.
3. Packing:
Drum: Galvanized iron drum, 225kg net each drum.
| Category | Product Type | Appearance | Color, Gardner grade | Softening point (R&B), °C | Acid Value(mgKOH/g) | Alcohol insoluble substance (%) | Unsaponifiable matter (%) | Ash (%) |
| Gum Rosin / Refined Gum Rosin | Grade X | Transparent solid | Slightly yellow | ≥ 76 | ≥166 | ≤ 0.03 | ≤ 5 | ≤ 0.02 |
| Grade WW | Transparent solid | Pale yellow | ≥ 76 | ≥166 | ≤ 0.03 | ≤ 5 | ≤ 0.02 | |
| Grade WG | Transparent solid | Yellow | ≥ 75 | ≥ 165 | ≤ 0.03 | ≤ 5 | ≤ 0.03 | |
| Grade N | Transparent solid | Deep yellow | ≥ 75 | ≥ 165 | ≤ 0.03 | ≤ 5 | ≤ 0.03 | |
| Grade M | Transparent solid | Yellow brown | ≥ 74 | ≥ 164 | ≤ 0.04 | ≤ 6 | ≤ 0.04 | |
| Grade K | Transparent solid | Yellow red | ≥ 74 | ≥ 164 | ≤ 0.04 | ≤ 6 | ≤ 0.04 | |
| Refined Gum Rosin LGR-2 | Transparent solid | Gardner grade 2max | ≥ 76 | ≥ 165 | ≤ 0.03 | ≤ 5 | ≤ 0.008 | |
| Refined Gum Rosin LGR-3 | Transparent solid | Gardner grade 3max | ≥ 76 | ≥ 165 | ≤ 0.03 |
