Institute of Interconnecting and Packaging Electronic Circuits (IPC)
Scope
In the early 1970's the only fluxes permissible for electronics manufacturing for military
applications were types R (pure rosin only) and RMA (rosin based, mildly activated).
Before any of these fluxes could be approved and established on the military "qualified
products list", it was necessary to demonstrate that were non-corrosive and did not
contain ionic halides in of established critical levels. All fluxes were required to pass a
silver chromate paper test which sensitively indicates presence of halide ions.