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Ca- & Mg-gebundene Verunreinigungen)
combustion residues
The passivating action is based on the removal of iron atoms by dissolution from the surface and the increase of relative chromium content at the surface
S 20 ist ein flüssiges
Harte Schmucksteine
EC 90 Chemie Ca- & Mg-gebundene Verunreinigungen)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
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