If someone sent me a ton of B Mix, (I will
forward my shipping address if anyone is interested) I would
throw a couple of bags, make some shrinkage bars, and see what I
think about it. Then I would see how it
dries, how it bisque fires, and glaze fires. Then I would see how
my glazes fit and calculate shrinkage and
THEN I would alter as needed, to suit me and to make it
technically perfect. I do like the look of a
But I doubt I will ever quit using my Blackjack clay. It only
makes sense to use locally mined clay
that has been wet-blunged and never dried. I add things to it when
I get the filter cakes stacked on
a pallet. I am going for a whiter look for the batch I will be
making soon. Basically, I made some
porcelain, 50% EPK, 25% silica, 25% feldspar, that I will be
adding to the Blackjack at about 1/4
porcelain to 3/4 Blackjack. The Blackjack is so plastic no ball
clay is needed in the 'porcelain'.
Yes Mel, it's true that I have made my own cones. They are very
accurate, tested by firing side-by-side
with Orton cones. But, I haven't kept it up - one of those
educational endeavors just to prove I could
do it. At 10 cents a cone it's easier to just buy them.
However, I have saved a ton of money by making my own kiln posts.
My kiln post recipe is 50%
fire clay, 20% ball clay, and 30% crushed insulating firebricks,
window screen and smaller mesh (I
always have broken or crumbling IFBs around).
Of course they are extruded. Using a shrink rule, they are cut
long and shrink to even whole number
lengths when fired in a glaze firing.
On 9/7/2021 2:38 PM, mel jacobson
If someone sent me 2000 pounds of Bmix I would
run it all through my pug mill, add fine grog and
a pure silica sand and probably some black iron
sand. opps, it is no longer Bmix. I can fire anyway
I wish. I now control the clay, it does not control me.
If you buy any ready made product, you are tied to it.
it controls you. it must be fired a certain way, it has
limits. I do not want my pottery, work and art starting