Dannon Rhudy on thu 1 mar 01
Autumn Downey said:
>I thought that what we received most of the time now when we ordered bone
>ash was a manufactured version (from whence I have no idea) and that it
>went by the name of tricalcium phosphate. Am I imagining this?.....
No, you're not. You are quite correct. In order to get REAL bone ash,
one must specify it. And often it is not available. Certainly it is a lot
more expensive. Tricalcium Phosphate is relatively cheap.
regards
Dannon Rhudy
>
Autumn Downey on thu 1 mar 01
I thought that what we received most of the time now when we ordered bone
ash was a manufactured version (from whence I have no idea) and that it
went by the name of tricalcium phosphate.
Am I imagining this?
Autumn Downey
Yellowknife, NWT
Tom Buck on fri 2 mar 01
AD:
Chances are that you are receiving trical. Last I heard in UK
animal bones are still being calcined to ash. In NA most bone goes into
bonemeal for gardeners, farmers. But with many phosphate fertilizer plants
in operation in NA, it is common practice to make some trical by adding
hydated lime to phosphoric acid, CaOH to H3PO4. Trical comes in industrial
and food grades. Trical is uniform, from bag to bag. Bone ash (real bone
ash) isn't.
bye. Peace. Tom.
Tom Buck ) tel: 905-389-2339
(westend Lake Ontario, province of Ontario, Canada).
mailing address: 373 East 43rd Street,
Hamilton ON L8T 3E1 Canada
Hank Murrow on fri 2 mar 01
>Autumn Downey said:
>
>>I thought that what we received most of the time now when we ordered bone
>>ash was a manufactured version (from whence I have no idea) and that it
>>went by the name of tricalcium phosphate. Am I imagining this?.....
Dannon replied;
>No, you're not. You are quite correct. In order to get REAL bone ash,
>one must specify it. And often it is not available. Certainly it is a lot
>more expensive. Tricalcium Phosphate is relatively cheap.
And Hank weighs in;
"Real" bone ash is produced largely for the photographic film industry as a
key ingredient in film emulsions. My bags have Kodak stencilled on them. As
digital, or filmless, cameras ascend in importance, there may come a day
when real bone ash will get harder to find. Fortunatly, I have a near
lifetime supply on hand, as I have grown to love it so. I have a 32% bone
ash glaze which is a honey, and was published in Ian Currie's new book,
"Revealing Glazes".
Good Hunting!
Louis Katz on fri 2 mar 01
My only experience with these two came form some tests done in KC '79-'81 or
there abouts. Ferguson, Ken, was having trouble with a glaze , Tomato Red. It was
no longer working. He thought it was the iron, then the bone ash, got Andy Martin
to make some real bone ash. Went to the stockyards, created a real stink in the
second chamber of the wood kiln. Still trouble with the glaze. Ended up being the
Custer Feldspar, or the whiting, can't remember anymore, just wasn't the bone ash.
If it was my choice I would say do your tests with tricalcium phosphate, unless
you have a specific need or want to use bone ash. Course if it used to work and
you had real bone ash and now it doesn't,...
Louis
Louis.Katz@mail.tamucc.edu
http://www2.tamucc.edu/~lkatz/
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