This is the fine powder form of Borax used for all precious metals, silver, gold as well as copper., Jeweller's and Silversmith's soldering
Anhydrous Borax by Depot Flux
Reagant - UK
Solder Flux - UK
Lead-free solder paste, buy QJ101 silver solder powder Silver solder paste Flux Silver solder powder Borax 100g silver solvent on China Suppliers Mobile - 161182121
Soldering Flux - UK
The Flame Welding Flux Soldering And Powder Silver Brass - Temu
N.W. 60g Silver soldering and brazing flux Brass Brazing Fluxes powder for copper tube, copper and iron welding etc. - Price history & Review, AliExpress Seller - Delkold Electric Store
Borax Flux - Santa Fe Jewelers Supply : Santa Fe Jewelers Supply
Delft Clay Sand 1kg - At The Bench Store
100g/1lot air conditioner borax the flame brazing welding flux soldering and brazing powder Silver Copper Brass iron - AliExpress
100g/1lot air conditioner borax the flame brazing welding flux soldering and brazing powder Silver Copper Brass iron - AliExpress
This torch features instant electronic ignition, adjustable flame and can be used in a hand held or freestanding position, 1300°c adjustable
Jewellers Torch Solder Hand Held Micro-Torch