White-colored copper alloy with reduced nickel content

3) A copper alloy of white visual appearance similar to one of stainless steel and “nickel silver” the copper alloy consisting essentially of:

• a) 6-25% zinc (Zn),
• b) 4-17% manganese (Mn),
• c) 0.1-2.5% iron (Fe),
• d) a balance of substantially Cu
• e) wherein the combination of a-d exhibits a white visual appearance and is effectively antimicrobial.

5) A copper alloy of white visual appearance similar to one of stainless steel and “nickel silver”;

• the copper alloy consisting essentially of:
• a) 6-25% zinc (Zn),
• b) 4-17% manganese (Mn),
• c) 0.1-5% nickel (Ni),
• d) 0.05-2.5% iron (Fe), and
• e) a balance of substantially Cu;
• f) where the combination of a-e is effectively antimicrobial and has a white visual appearance.

18) A copper alloy of white visual appearance and resistant to touch tarnishing to be used for coinage applications as a direct replacement for C713, the copper alloy comprising:

• a) 6-25% zinc (Zn),
• b) 4-17% manganese (Mn),
• c) 0.1-9.0% nickel (Ni),
• d) a balance of substantially Cu;
• and
• e) said combination of a-d having a white visual appearance, is effectively antimicrobial and has an electrical conductivity greater than 2.5% IACS at eddy current gauge exciting frequencies between 60 kHz and 480 kHz.