Explanatory notes
… (e.g., aluminium, cadmium, arsenic, magnesium) or elements sublimable at the fusion temperature, or else to facilitate … certain alloys by adding de‑oxidising, de‑sulphurising or similar elements (e.g., calcium). The copper acts as a … sufficient to reduce the melting point or the oxidising or sublimating action of the master alloy. If the proportion of …