"An Investigation into Lead-Free Low Silver Cored Solder
Wire for Electronics Manufacturing Applications"
For testing, the customer opted to use a 2% flux cored solder
it had on hand.
Per FIGURE 7, 1mm, Teflon-insulated, solid copper wire was hand-soldered to the required test points, using a no-clean, lead-free cored solder
Due to the component size, the typical hand soldering process using wire cored solder
is not very controllable.
A low-solids, no-dean paste, wave flux and cored solder
were used on the assembly and each qualified with standard surface insulation resistance (SIR) testing.
Many of today's low-solids fluxes, pastes and cored solder
can generate a white residue if the flux is partially cleaned and exposed to a small amount of water.