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ELC A10 is a mildly alkaline
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
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EC 90 Chemie ELC A10 is a mildlyEC 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
