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such an improvement is desirable in an alloy which is not produced primarily for its high strength. A harder alloy would be less susceptible to smearing and gold enrichment of the surface during polishing, a feature important for display. On the other hand, less wear and deterioration of colour in the abrasive conditions of service could be expected.doi:10.1007/bf03215096 fatcat:wtmmwjzqlzcepo5xnlezefzsmi