Raising & Reducing Karat

Reducing Karat

Reducing Gold to a Lower Karat

From To 9K To 10K To 14K* To 18K
24K 1.700 1.400 0.714 0.333
18K 1.025 0.800 0.286
14K* 0.575 0.400
10K 0.125

* 14K values are based on 0.5833.

To reduce the karat, find the current karat in the left hand column of the table; then read across to the column headed with the desired karat. The factor found here is then multiplied with the weight of the karated gold to be converted. The resulting number is the weight of alloy to be added to the original metal. For example – when changing 25 dwts of 14K to 10K;

1. Find the factor factor for converting 14K to 10k = 0.400

2. Multiply the factor by the weight of metal to be converted 25 dwts x .400 = 10 dwts

Therefore, 25 dwts of 14K, when added to 10 dwts of alloy, yields 35 dwts of 10K.

Raising Karat

Raising Gold to a Higher Karat

From To 10K To 14K* To 18K
9K 0.071 0.500 1.400
10K 0.400 0.800
14K* 0.400

* 14K values are based on 0.5833.

To raise the karat, find the current karat in the left hand column of the table; then read across to the column headed with the desired karat. The factor found here is then multiplied with the weight of the karated gold to be converted. The resulting number is the weight of fine gold to be added to the original metal.

For example – when changing 25 dwts of 10K to 14K;

1. Find the factor factor for converting 10K to 14k = 0.400

2. Multiply the factor by the weight of metal to be converted 25 dwts x .400 = 10 dwts

Therefore, 25 dwts of 10K, when added to 10 dwts of fine gold, yields 35 dwts of 14K.

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