Our rosin, also called colophony or Greek pitch, is a solid lump of resin obtained from the internal trunks of pine trees. It is produced by melting the resin at high temperature, and then drying and hardening the remaining substance. It has no fixed melting point, and its color is burnt yellow or crimson. This product is mainly applied in the flux during the electronic circuit soldering process. We currently produce the polymerized colophony, polypale rosin-145, hydrogenated colophony, and some others.
So far, our product has been exported to such countries as India, Pakistan, Ukraine, Belarus, Colombia, and more. Moreover, we are searching for new agents around the world. Welcome to contact us, if you show interest in our product. We can understand your needs by email, phone, fax, or others.
1. Physical and Chemical Properties of Hydrogenated Colophony 101
White or pale-yellow bulk solid
Softening Point (Ring and Ball Method) ℃
Acid Value (mg KOH/g)
Ethanol-insoluble Matter %
Unsaponifiable Matter Content %
It can be dissolved in methyl alcohol, ethanol, isopropanol, or other high-boiling-point solvent. Its color is pale yellow, and no sediment can be found.
2. Physical Properties of Per-hydrogenated Colophony RHR-301
Lump, solid (flake)
Alcohol-insoluble Matter Content
Hot Water-Soluble Matter Content
Unsaponifiable Content Matter
Resin Acids %
Four Hydrogen Resin Acid
3. Physical Properties of Polypale Rosin-145
lighter than grade two in accordance with the standard color chart
Hot Water-Soluble Matter
Unsaponifiable Matter Content
Beyond that, we can supply various types of colophony dedicated for solder products, like solder wire, solder paste, and more.
Colophony | Rosin Soldering Flux | Solid Flux
Solder Wire, Solder Bar, Solder Paste Manufacturer
The demand for lead-free solder has increased dramatically since the 2006 restriction came into effect for intentionally leaded consumer electronics. As a dedicated OEM manufacturer, JUFENG can provide lead-free solder wires with a diameter of 0.1mm or greater. Our massive inventory also includes a premium selection of solder ball, flux, paste, and powder.