COBAR WAVE SOLDERING FLUX 385-D High-reliability flux showing highest SIR values under the most extreme test conditions.Utilized in a nitrogen atmosphere, this flux shows hardly any visible residues. IPC J-STD-004 classification REL0 Physical and chemical properties 1.SG @ 20C [kg/dm3] (+/- 0.5%) :0.804 2.Solids content [% w/w] 3.Halides [Silver-Chromate Test]:Pass 4.Halides [Potentiometric] :Pass 5.Acid number [mgKOH] (+/-2.5%) :18.75