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Old 03-26-2006, 09:25 AM
Dave Bross Dave Bross is online now
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Kevin,

Good!

One suggestion, use 454 grams for a pound. You will want to be in the habit of being very accurate later. Particularly mixing small amounts of things. The errors become more outstanding as the quantity gets smaller.

It's actually 453.59 but that much rounding off to 454 is OK. As an ex car nut it's easy for me to remember because that is the same number as the displacement of a big block Chevy motor.

Don't put iron in your copper ruby. It will brown out the color. The old timers put it in there supposedly as an assist to the crystalization, but you don't need it .

Here's a little memory aid for doing percentages:

Target over total times 100


Say you had seven pounds of one thing and one pound of something else mixed together. Eight pounds total.

You wanted to know what percent the one pound was of the eight pound total. Divide one (the "target" number) by eight (total), which gets you 0.125.

Multiply 0.125 by 100, which is simply done by just moving the decimal point over two numbers to get 12.5.

The one pound is 12.5% of the eight pounds.

In glass batching/color work you don't need any more accuracy than two decimal points, or to say that another way, we only go as far as hundreths of a percent or two numbers to the right of the decimal point.

You'll find this mentioned in Scholes too.
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