Assertion: lead solder | /r/HasAspect | 1 to 2% rosin
Facets:
value: by weight
type: OTHER
value: as a flux core
type: MANNER
Source sentences:
text: The lead-tin solder commonly used in electronics has 1 to 2% rosin by weight as a flux core, helping the molten metal flow and making a better connection by reducing the refractory solid oxide layer formed at the surface back to metal.