Overcarated gold alloys Use this on-line application to quickly determine the amount of master alloy that you will need to add when you have an overcarated gold alloy. How it works: • Type the current weight of the gold alloy, expressed in grams, in the first section. • Type the current caratage of the gold alloy, expressed in parts per thousand, in the second section. • Type the title of the gold alloy that you wish to obtain in the third section. • Click on "submit" to visualize the total weight and the amount of master alloy that you will need to add. • If you make a mistake, use the backspace key to erase and retype your entry. If you make several mistakes, you can clear the form by clicking on the "Reset" button. Weight of the alloy (g) Caratage of the alloy (p.p.t.) Title of the alloy to obtain (p.p.t.)     Undercarated gold alloys Use this online application to quickly determine the amount of gold that you will need to add when you have an undercarated gold alloy. How it works: • Type the current weight of the gold alloy, expressed in grams, in the first section. • Type the current caratage of the gold alloy, expressed in parts per thousand, in the second section. • Type the caratage of the gold alloy that you wish to obtain in the third section. • Finally, type the fineness of the gold that you are going to use, expressed in parts per thousand. • Click on submit to visualize the total weight and the amount of pure gold that you will need to add. If you make a mistake, use the backspace key to erase and retype your entry. If you make several mistakes, you can clear the form by clicking on the "Reset" button. Weight of the alloy (g) Caratage of the alloy (p.p.t.) Caratage of the alloy to obtain (p.p.t.) Fineness of the gold in use (p.p.t.)     Intermediate gold alloys Use this on-line application to quickly determine the amount of two gold alloys that you need to mix when you want to create a gold alloy with an intermediate caratage. How it works: • Type the current weight of the gold alloy with higher caratage in the first section. • Type the caratage of the gold alloy with higher caratage, expressed in parts per thousand, in the second section. • Type the current weight of the gold alloy with lower caratage in the third section. • Type the caratage of the gold alloy with lower caratage, expressed in parts per thousand, in the fourth section. • Click on submit to calculate the weight of the gold alloy with higher caratage and that of the gold alloy with lower caratage that you will need to use. Weight alloy with higher caratage (g) Caratage alloy with higher caratage (p.p.t.) Weight alloy with lower caratage (g) Caratage alloy with lower caratage (p.p.t.) Caratage alloy to obtain (p.p.t.)

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