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Gold colour and karat |
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| colour | karat | finegold% | finesilver% | copper% | zinc% | nickel% | |||||||||
| yellow | 9.5 | 39.60 | 12.08 | 42.28 | 6.04 | -- | |||||||||
| 13.5 | 56.25 | 8.75 | 30.65 | 4.35 | -- | ||||||||||
| 14. | 58.33 | 8.31 | 29.19 | 4.17 | -- | ||||||||||
| 18. | 75.00 | 15.00 | 10.00 | -- | -- | ||||||||||
| white | 9.5 | 39.60 | -- | 34.00 | 8.70 | 17.70 | |||||||||
| 13.5 | 56.25 | -- | 24.63 | 6.30 | 12.82 | ||||||||||
| 14. | 58.33 | -- | 23.47 | 5.99 | 12.21 | ||||||||||
| 18. | 75.00 | -- | 2.23 | 5.47 | 17.30 | ||||||||||
| green | 13.5 | 56.25 | 36.70 | 6.80 | .25 | -- | |||||||||
| red | 13.5 | 56.25 | 2.20 | 41.55 | -- | -- | |||||||||
| To 995 karat 1 gr. fine gold 0.32666 alloy added | |||||||||||||||
| fine gold | fine silver | copper | |||||||||||||
| pink | 1 gr | 0.110 | 0.223 | ||||||||||||
| red | 1 gr | 0.050 | 0.283 | ||||||||||||
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To
lower the gold karat:
G (K - W) A=
W A =
the alloy weight we will add to lower the karat G = weight of fine gold W = the karat we want to get K = karat of gold in hand For example: We have 70 gr 24 karat of gold. We want to lower the
karat to 14 karat.
70
( 24 – 14 )
70( 10 )
700 A
=
14
14
14
We
add 50 gr. alloy to 70 gr fine gold we get 120 gr. 14 karat gold. |
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To
raise the karat of gold:
S ( KW _ KS ) FG =
24 – KW FG = fine gold KS = karat of scrap gold KW = the karat we want to get S = weight of scrap gold For example: We have 20 gr. 10 karat gold. We want to increase the
karat to 14. How much gold we should add?
20 ( 14 – 10 )
20
( 4 )
80 FG =
24 – 14
10
10 If we add 8 gr. fine gold to 20 gr 10 karat gold we get 28 gr. 14
karat gold. |
