First Page
Posted 01/02/2013 03:16 am
Our current silver coins (Cupronickel: 75% copper & 25% nickel) being the 5c, 10c, 20c & 50c will turn a golden colour if cooked in the oven.
Our current gold coins (92% copper, 6% aluminium & 2% nickel) being the $1 & $2 will turn a purplish colour.
That's our science experiment for the evening. Use a few of the same denomination, maybe one wrapped in aluminium foil, maybe one wrapped in baking paper & another wrapped in something else that's not burnable. Set oven to a lower temperature, maybe 150ยบ for a decent amount of time. See what changing the temperature & times will do to alter the colours.
Our current gold coins (92% copper, 6% aluminium & 2% nickel) being the $1 & $2 will turn a purplish colour.
That's our science experiment for the evening. Use a few of the same denomination, maybe one wrapped in aluminium foil, maybe one wrapped in baking paper & another wrapped in something else that's not burnable. Set oven to a lower temperature, maybe 150ยบ for a decent amount of time. See what changing the temperature & times will do to alter the colours.
