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 re-calculate 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 re-caluculate 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 re-calculate 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 re-caluculate 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 barium-to-strontium 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 re-adjust 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 re-calculate 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
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