society > occupation and work > materials > derived or manufactured material > materials used in metallurgical processes > [noun] > substance mixed with metal to facilitate fusion
fluss1683
white flux1741
flux1763
welding powder1873
fluxing1880
1873 E. SponWorkshop Receipts 1st Ser. 361/1 The steel to be welded..is then dipped into the welding powder, and again placed in the fire.