Question:

Converting 18ct gold 22ct gold?

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i have 350.85 g of 69.5% touch gold , i want to convert it 75% gold so much i add pure? send it detail how its converted.

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  1. If I understand correctly that you have 350.85 grams of .695 fine gold,

    that you want to convert to 18K (.750 fine)

    Then there is  350.85 x  .695 = 243.84075 grams of 24K gold in it.

    So we set up an equation. g will be the amount of gold that we will add.

    (243.84075 + g ) / (350.85 + g ) = .750

    The new amount of the pure gold divided by the new total weight must be .750

    So fiddling the numbers,

    ( 243.84075 + g ) = 0.750 x ( 350.85 + g )

    243.84075 + g = 263.1375 + .75g

    0.25g = 19.29675

    g = 77.187 grams

    Check:

    (243.84075 + 77.187  ) / (350.85 + 77.187  )

    321.02775 / 428.037 = 0.75

    I want to learn to be a goldsmith!


  2. Wrong category.

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