This part of ISO 9455 specifies a gravimetric method for the determination of the content of non-volatile matter in soft soldering fluxes. It is applicable to liquid and paste fluxes of type 1, as defined in ISO 9454-1.
GSO ISO 9455-1:2013 history
2013GSO ISO 9455-1:2013 Soft soldering fluxes -- Test methods -- Part 1: Determination of non-volatile matter, gravimetric method