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High quality rosin core solder made by Kester. This is a leaded solder and is commonly used in electronics assembly or repair.Alloy: Sn63Pb37
Core size: 66
Rosin “44”® is a high activity RA core flux designed for
excellent instant wetting action, even on Nickel surfaces.
Although “44”® is a RA-based material, the residues are
non-corrosive if not cleaned. Per J-STD-004, “44”® is
classified as ROM1 flux.
NOTE: Picture provided is of reasonable likeness.
More information from the manufacturer:
"44" Flux Residues: The question is frequently asked are "44" flux residues harmful to an assembly.
The “44” flux residues are non-conductive and non-corrosive. Residue removal would normally be for cosmetic reasons. If the assembly is in a heated environment and sees temperatures of over 160°F the flux residues will re-melt. When liquid (at high temperatures) the residues are conductive.
Datasheet in PDF (44_Global_(14Jun07).pdf)