For every day use, modern coinage is based on metals such as Copper, Nickel, Zinc and Aluminium, with the preference given to a higher percentage of Copper. Despite enthusiasm for progress, Central Banks are often reluctant to make changes in the coins that are in circulation and changes if any, take place very slowly.Central Banks consider various factors while choosing their coins and generally the seneorage and colour play an important role in the decision making process. There are three colours of coins that are widely used and these are Yellow, Reddish and White. The colours depend on the percentage of Copper, Zinc and Nickel in the coins. Coinage materials around the world are generally categorized under four combinations and these are Cupro-Nickel, Nickel Silver, Brass, Bronze and Aluminium Bronze.You would be pleased to know that 3C is regularly advising Central Banks on the alteration and renewals of existing series and has been instrumental in helping several Central Banks around the world in advising – designing – samplingand production of new issue of coins. 3C offers to Central Banks its technical assistance and advise to achieve an excellent end product and closely works with each one of them to overcome the difficulties encountered at any point of time. We are in a position to offer a comprehensive service to the issuing banks beginning with creative ideas for new coin values up to the delivery of coins
free vault.
The following services are available ::

  •  Advice on design to complement existing series, alterations and renewals together with the introduction of new coins and coin series.
  •  Development of ideas on the form of new coin denominations including artistic and graphic design.
  • Sampling of, and advice on, the suitability of coinage alloys.
  • Integration of security features in coinage material and coin design.
  • Supply of coins in collector quality in “proof like” or “proof ” condition, in standard packing or luxury cases.
3C Coinage DIN Designation Main Elements Density Kg / dm3
Vickers Hardness Properties
Cupronickel 25 CuNi 25 Cu 75%, Ni 25% 8.9 80 White standard material
Cupronickel 16 CuNi 16 Cu 84%, Ni 16% 8.9 75 Yellowish-white
Cupronickel 10 CuNi 10 Cu 90%, Ni 10% 8.9 75 Reddish-white
Cupronickel 8 CuNi 8 Cu 92%, Ni 8% 8.9 70 Reddish
3C Coinage DIN Designation Main Elements Density Kg / dm3
Vickers Hardness Properties
Brass 95/5 CuNi 5 Cu 95%, Ni 5% 8.9 65 Red
Brass 90/10 CuNi 10 Cu 90%, Ni 10% 8.8 70 Red
Brass 85/15 CuNi 15 Cu 85%, Ni 15% 8.8 70 Red-golden
Brass 72/28 CuNi 28 Cu 72%, Ni 28% 8.6 75 Yellow
Brass 70/30 CuNi 30 Cu 70%, Ni 30% 8.5 75 Yellow
Brass 6436 CuNi 36 Cu 64%, Ni 36% 8.4 85 Yellow
Brass 60/40 CuNi 40 Cu 60%, Ni 40% 8.4 85 Yellow
3C Coinage DIN Designation Main Elements Density Kg / dm3
Vickers Hardness Properties
Nickel silver 25 CuNi25Zn15 Cu 60%, Ni 25%, Zn 15% 8.8 85 White
Nickel silver 18 CuNi18Zn20 Cu 62%, Ni 18%, Zn 20% 8.7 85 White
Nickel silver 15 CuNi15Zn25 Cu 60%, Ni 15%, Zn 25% 8.7 85 Still white
Nickel silver 12 CuNi12Zn24 Cu 64%, Ni 12%, Zn 24% 8.7 85 Yellowish-white
Nickel silver 9 CuNi9Zn10 Cu 81%, Ni 9%, Zn 10% 8.75 70 Golden-yellow
Nickel silver 6 CuNi5.5Zn24.5 Cu 70%, Ni 5.5%, Zn 24.5 8.7 85 Light yellow
Nickel-brass CuNi5Zn20 Cu 75%, Ni 20%, Zn 5% 80 Golden-yellow
Nickel-brass CuZn20Ni Cu 79%, Ni 20%, Ni 1% 8.7 70 Golden-yellow
3C Coinage DIN Designation Main Elements Density Kg / dm3
Vickers Hardness Properties
Aluminium-Bronze 8 CuAI8 Cu 92%, AI 8% 7.7 90 Yellow
Aluminium-Nickel-Bronze 6 CuAINi2 Cu 92%, AI 6, Ni 2% 8.1 85 Yellow
Aluminium-Nickel-Bronze 5 CuAI5Ni2 Cu 93%, AI 5%, Ni 2% 8.1 85 Yellow
Aluminium-Nickel-Bronze 2 CuAI2Ni6 Cu 92%, AI 6%, Ni 2% 8.6 85 Reddish-brown