Flux type.

Type R. Type R is intended for use in the preparation of soldered joints for electrical and electronic application.

Type RMA. Type RMA provides a slightly more active fluxing action than type R.

Type RA. Type RA provides more active fluxing action than type RMA. It should be used only for soldering joints which are readily accessible so that the residues can be removed by cleaning agents and procedures specified in the governing document (drawing or specification) for the assembly in which the joints are used. Since the fumes and particulates given off during soldering may also be corrosive and contaminate the area surrounding the joint, this too must be susceptible to effective cleaning by the combination of materials and procedures to be used.

Type AC. Type AC is intended for use exclusive of that in electrical or electronic circuits in the preparation of soldered connections for all common metals or alloy, other than aluminum and magnesium and their alloys.