Emily P. Henderson on sun 19 jan 97
'Tis I again...Alice in Wonderland... I have the following glaze taken from
the typescript of Carleton Ball's Syllabus pg. 49. It is calculated in
"parts" Can any of you recalculate this for me into percentages, or teach
me how to do so?
^ 6 ^10 oxidation or reduction described as "an excellent glaze to use
over engobes"
parts
Flint: 65
Kaolin: 5.25
Whiting: 20.75
Neph Sy: 95.50
Dolomite: 30.75
Barium Carb: 16.50 (I would like to recaluculate for
Strontium
@ 3/4 Strontium Carb : 1 Barium Carb)
Can any of you glaze gurus help me out on this one too? Emily, in Astoria,
where it's raining.... :(
Bill Aycock on mon 20 jan 97
At 12:40 PM 1/19/97 EST, you wrote:
>Original message
>'Tis I again...Alice in Wonderland... Can any of you recalculate this for
me into percentages, or teach me how to do so?
>
> parts
>Flint: 65
>Kaolin: 5.25
>Whiting: 20.75
>Neph Sy: 95.50
>Dolomite: 30.75
>Barium Carb: 16.50 (I would like to recaluculate for
>Strontium
> @ 3/4 Strontium Carb : 1 Barium Carb)
>
Emily, in Astoria,
Emily (I have a daughter named Emily, who is a sculptor ) Try the following:
1. Add up all the "parts" in this case, you get 233.75
2. divide each of the "parts" numbers in the list by this number, then
multiply by 100.
(example 65 divided by 233.75 is about .2781 [ icould give it to 8 places,
but why?] this answer is multiplied by 100 to get 27.81%). For the Barium
(because I need this number later) the answer is (16.5/233.75)x100=7.05%
3. if you do this for all the ingredients, you will get numbers that add up
to 100.
4. to adjust the bariumtostrontium substitution, (using your ratio of 3/4)
change the 7.05 I got above, to (3/4)x7.05, or 5.29% This, of course, makes
you mix add up to a number smaller than 100, but, as the teachers say, you
can readjust these numbers the same way, which is an excercise we will
leave to the student (YOU)
Have fun Bill, on Persimmon hill, where every table in the house has a
calculator hidden nearby.
Bill Aycock  Persimmon Hill  Woodville, Alabama, USA
 (in the N.E. corner of the State)
also W4BSG  Grid EM64vr
Tony Hansen on mon 20 jan 97
> 'Tis I again...Alice in Wonderland... I have the following glaze taken from
> the typescript of Carleton Ball's Syllabus pg. 49. It is calculated in
> "parts" Can any of you recalculate this for me into percentages, or teach
> me how to do so?
To calculate a recipe to percent just total it and divide each number
by the total and multiply by 100.

=================================================================
Tony Hansen, IMC  Publishers of INSIGHT/FORESIGHT/Magic of Fire
Bob Kavanagh on mon 20 jan 97
Emily
To get a percentage from a "parts" recipe, begin by adding the total of the
parts: in this case, the total is 233.75. To make 233.75 into a percentage
(in this case 100%, since it is the total of everything there is), divide
233.75 by 233.75 and multiply by 100). To make any "part" into a percent
of the whole, divide that part by 233.75 and multiply by 100.
For example: 65 parts = 27.81% (65 divided by 233.75 multiplied by 100).
Was this your question?
bob kavanagh
 
