| http://www.w3.org/ns/prov#value | - This stabilizing material is generally a more noble metal such as platinum, palladium or gold, the preferred material being palladium, usually in solution in concentrations ranging from 0.05 to 100 g/L, preferably 0.2 to 10 g/L. Unleached deposits 18 and partially leached deposits 18A in the pores 14 act as seeds for deposition of the more noble metal from the stabilizing solution and are at least
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