bill edwards on thu 9 jun 05
This minor rant was in response to the potential of
strontium being used in a recipe where a pot may or
may not have changed its color under light conditions.
Strontium - soluble in acids, not in water. If under
U.V. light situations I would suspect it having
potential for some light changes since it is a
derivitive from alkaline rare earth based photo
luminescent material with a lower atomic number.
(Glow) I don't see this as a common problem but more
specific to individual formulation, ammount used etc.
IMHO light changing chemicals are not knew and
lanthanide colorants merge into this field to some
degree as would phosphorus when oxygen is exposed to
it. I looked it up for it's latin term and it means
'Morning Star' and in Greek 'light and bring'. Don't
cha just love pottery and all that light bringing
stuff we get and especially those brightly done glazes
where good formulating meet it's final match in the
fire. Glowing Pots and Glowing smiles are always a
great beacon for customers and a treat for the potter
as well.
Melting Point (F) 2012
here's a MSDS url for more info. with all that mol
equiv info and other goodies.
http://www.jtbaker.com/msds/englishhtml/s6890.htm
Don't confuse strontium SrCO3 with Strontium-90 which
is entirely a different creature a potter wouldn't
want to tangle with. Strontium and iron is used to
make magnets and strontium is widely used in making
television tubes for color tv as well as in the
fireworks markets for its color red.
Phoshorescent pigments contain strontium aluminates as
part of the raw production in manufacturing for this
often used colorant in the arts industry and countless
other markets.
Bill Edwards
Edmar Studio and Gallery
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