need to know raising 1OZ of 10kt to 1 OZ of 18kt.

Thanks Jimmy Rolex

need to know raising 1OZ of 10kt to 1 OZ of 18kt.

Thanks Jimmy Rolex

`need to know raising 1OZ of 10kt to 1 OZ of 18kt.`

For 1oz of 10k you should add 1.35oz of 24k to raise the 1 oz of 10k

to 2.35oz of 18k (actually 75.1%)

I have created a simple spreadsheet that works this out for you on

the fly - let me know if it would be of use and I will post a link.

If you want to work it out on paper

1g of 10k = 0.42g gold and 0.58g alloy

The only thing you want to change is the gold content so the alloy

weight stays the same.

18k is 75% gold so if the alloy is 25% at 0.58g, the gold content

must be three times this (3 x 0.58g = 1.75g)

The new mix will be 1.75g gold and 0.58g alloy - total weight =2.33g

You already had 0.42g of gold in the original 10k mix so 1.75g -

0.42g = 1.33g

Then it would be wise to add a smidge more gold to ensure that the

resulting alloy passes the required 75% margin.

Kind regards

Chris Parry

Jimmy,

To raise 10kt to 18kt. simply multiply the amount of 10kt gold that

you have by 1.333 to find the amount of pure gold you need to add.

In your example you will multiply 20dwt ( or 31.1 grams if you

prefer ) x 1.333 which equals 26.66 dwt of pure gold ( or 41.1563

grams )

Greg DeMark

greg@demarkjewelry

www.demarkjewelry.com

Jimmy,

Since you must add fine gold to the lower karat gold in order to

raise the karat, there is no way that 1 oz. of 10 k can be raised to

only 1 oz. of 18k. The formula is : (18-10) x 31.1 divided by (24 -

18) = 41.46g 24k. That is, you take the desired karat (18) and

subtract the beginning karat (10) and multiply the difference(6)

times the beginning weight 31.1grams (one troy ounce) and divide the

product (248.8) by the difference between the karat of pure gold (24)

and the final desired karat (18.) The result is 41.46 which is the

weight of 24k metal you must add to raise the karat of the 10k to 24.

The final weight would be 72.56grams or 2.333 troy ounces of 18k

gold.

Jerry in Kodiak

Hi there,

When you finish, you will not have 1 oz. total- you’ll have alittle

more…Take your 10kt.

10kt. X 1.333= The amount of 24kt to add to the mix in order to melt

and achieve the desired 18kt. Example: 20 dwts. of 10kt. PLUS 26.66

24kt.= 18kt. In this case: 20(10kt.) + 26.66(24kt.)= 46.66 dwts

(18kt). So, you see this would be more than 1 oz. when

finished…Remember 20 dwts.= 1 oz. Here’s how you can re-check these

figures for acuracy-- Doublecheck: 20 dwt x.416 (10/24 =.416) =8.32

fine gold.(actual gold held in 10k) 46.66 x.75 (18/24 =.75) = 34.99

fine gold 8.32 dwt.fine from 10kt + 26.66 added =34.98 fine

So, now that you are clear- you will end up with alot more 18kt. If

you only need an ounce of 18kt., then start with less 10kt, add the

appropriate amount of 24kt.(fine gold) and you can end up with the

desired amount of 18kt. Just remember to multiply the amount of

10kt. X the factor of 1.333 in order to find the amount of 24kt.

needed…

Good Luck, Jo-Ann & John Donivan

Hi

Precise instructions for raising or lowering karat gold can be found

at http://preciousmetalswest.com/dangling_a_karat.htm Just be sure to

double check your results!

Daniel Ballard

`need to know raising 1OZ of 10kt to 1 OZ of 18kt.`

Multiply weight of 10k x 1.333 of 24k and mix to get 18k

Chris