FIELD: making of jewelries; electronic industry, soldering of units in vacuum. SUBSTANCE: in production of multicomponent powder precious metal based solders, initial materials in form of powder metals, their oxides or salts are ground separately to size not exceeding 32 μm and are mixed with previously ground water soluble salt to size not exceeding 100 μm and inert to hydrogen at ratio not exceeding 2:1. Then mixture is heated in hydrogen units all components of solder are reduced, cooled in hydrogen flow, salt is dissolved in distilled water and remaining metal powder is filtered, washed in distilled water and dried. EFFECT: improved quality of solder. 3 tbl
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