Kester "44" Rosin Core Solder

The excellent wetting action of "44" rosin is the most outstanding property, and even more important and more significant is the fact that the flux is completely non-corrosive and electrically non-conductive.

Throughout its long years of wide usage in the electric and electronic industries, involving billions of soldered connections, there has never been a known case of corrosion by the flux residue.

Kester "44" rosin core is on the Qualified Products List under Specification QQ-S-571, Type WRAP.

Kester "285" Rosin Core Solder

Kester "285" rosin flux conforms to Federal Specification QQ-S-571 (type RMA) and is on the Qualified Products List. It also meets the requirements of both Bellcore specification TR-TSY-000078 and IPC-SF-818 (type LR3CN)) for cored wire products.

The fluxing ability of Kester "285" is much greater than ordinary type RMA fluxes and is nearly comparable to type RA (fully activated rosin) fluxes.

The high mobility and fast spreading action of Kester "285" results in rapid production line soldering without sacrificing reliability of the assembly. Also suitable for Applications where cleaning is not performed after soldering