EC 90 is an aqueous, neutral cleaning concentrate for jewellery and watch parts (cases, straps, clasps, bezels) to remove polishing pastes and general contamination. Applicable in immersion bath with or without ultrasound for precious metals, stainless steel, non-ferrous metals, aluminium, costume jewellery and jewellery with hard stones.
The cleaning of amorphous and soft stones (e.g. pearls, corals, amber etc.) is recommended with EC 90 in ultrasonic bath at frequencies ≥ 80 kHz (e.g. Elmasonic P) or in immersion bath. At lower frequencies, ultrasonic damage can occur!