ALPHA® 870-25 is an intermediate activity flux based on a water soluble resin and does not
contain organic acid activators. ALPHA® 871-25A contains both halide and organic acid
activation and is considerably more active. All the fluxes can be effectively cleaned with plain
water.
The base resin is a derivative of rosin, but unlike rosin, does not have any of the inherent fluxing
capabilities of rosin, nor does it dry to hard, encapsulating residues, as does rosin.
The water extract pH of these fluxes is higher, in general, than that of organic fluxes. For the
ALPHA® 870 Flux Series, it is neutral.
