crafts - human ashes in clay body/glaze

not such an odd question. it has been asked and answered here before. I
googled this group and cut/pasted two items below.

I don't think your customers are very odd. I will probably blend my
parents ashes and glaze vessels for all my sibs.
If we could afford it we'd do this.. www.lifegem.com

moose hunter wrote:
has anybody have iny info on incorporating human ashes into clay bodies
or glaze formulatiions?

I asume I could sub them for a bone ash flux in a tomoku, but I dont
want to do a whole pile of test tiles...

anyway,

did I mention I have some VERY odd customers?

Steve Mills
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More options Jul 8 2001, 2:24 pm
Newsgroups: rec.crafts.pottery
From: Steve Mills
Date: Sun, 8 Jul 2001 20:21:20 +0100
Local: Sun, Jul 8 2001 2:21 pm
Subject: Using Ashes for Glaze

Paul Soldner wrote an article in one of the American Mags on trying to
glaze with human ash; he found it almost impossible to make a successful
glaze with it, but found it good for decorating with (I think) under a
reliable transparent glaze.
From another source I have the following analysis (allegedly) of human
ash:

CaO 39.0%
P2O5 50.2%
K2O 4.8%
Na2O 3.8%
MgO 0.9%
SiO2 1.1%
Fe2O3 0.2%
ZnO 0.1%

Loss on ignition 94.8%

Hope this helps

Steve
Bath
UK

============================
My analysis for Pet Ash, carried out by CERAM at Stoke on Trent, was:-
Silica SiO2 1
Titania TiO2 .15
Alumina Al2O3 .6
Ferric Oxide Fe2O3 1
Lime CaO 45
Magnesia MgO 1.4
Potash K2O 11
Soda Na2O 4.5
Chromium Sesquioxide Cr2O3 .02
Cupric Oxide CuO .03
Manganic Oxide Mn3O4 .06
Phosphorus Pentoxide P2O5 28
Sulphur Trioxide SO3 .3
Zinc Oxide ZnO .25
Zirconia ZrO2 .2
LOI 6.66
Total 100

It does make glazes opaque, even over red earthenware.