SMT Solder Paste Manufacturers.
Focused on SMT soldering processes, a one-stop electronic soldering solutions provider.
Here you can find knowledge about Rosin-Core Solder Wire, including but not limited to usage methods, installation techniques, troubleshooting and more. Focused on SMT soldering processes. If you can't find what you need, please contact us anytime.
In SMT manual rework soldering scenarios, the choice between rosin-core solder wire and solid-core solder wire must be closely tied to solder joint quality, operational efficiency, and rework risk. Rosin-core solder wire is suitable for rapid rework soldering of small-batch, high-density, low-heat-capacity components, while solid-core solder wire is more appropriate for large pads, high-heat-capacity components, and military or medical PCBA sensitive to residues. The two have essential differences in terms of flux activity, thermal response, cleanability, and cost.
Published: 2026-08-27
The size of the rosin-core hollow in solder wire directly affects the flux release amount, wetting speed and residue distribution. An excessively large hollow easily causes solder spatter, cold solder joints and rosin overflow that contaminates the PCB, while an excessively small hollow leads to insufficient flux, poor wetting and solder joint spikes. In actual production lines, 0.5mm diameter solder wire paired with a 0.12mm rosin-core hollow is the optimal combination for SMT manual touch-up soldering and rework.
Published: 2023-08-25
A break in the rosin core of solder wire causes interrupted flux supply, poor wetting, and frequent cold solder joints during soldering. In actual production lines, this often manifests as dull solder joints, sharp spikes, and increased spattering, with problems becoming especially apparent during continuous wire feeding or manual touch-up soldering. Deviations in the concentricity between the solder wire and its rosin core, as well as fluctuations in the wire drawing process, are the root causes.
Published: 2017-12-21Our technical team is always ready to provide professional solder material selection advice and SMT process solutions.