Testing Moose Creek Feldspar Packaging
Wendt Pottery Helmer Page
1-208-746-3724 fax 1-208-746-6968 e-mail firstname.lastname@example.org
Now you can order mixed clay
only when you need it for $16.00 + $13.45 shipping (total cost $29.45/box delivered)
The boxes are shipped priority mail so now they are fully insured at no extra
cost. That means if a box is lost or damaged, it will be replaced. In all the
years I have shipped this way, only two boxes were ever lost.
Easy to throw and strong.
Large pots can be made with Helmer in place of ball clay. Mixed , deaired cone
10-12 porcelain is currently available at my studio in Lewiston for $16.00
for 257 cubic inch pugs (two of these 5.5" x 5.5" x 8.5" pugs fit in
the standard medium flat rate box and weigh approximately 38 LBS. They are sold
by volume, not weight). This also yields a useful fact in that the weight
of the pugged and deaired clay is 0.0739 lbs per cubic inch which makes it
easy to figure the amount of clay needed for some projects like tile or plates
of known thickness and diameter.
Our mixing train is all stainless steel and is used only for this
clay body so there is no chance of contamination from a low fire clay or grit
from a stoneware. The airfloat used to make the body comes from the dust
collector on our roll mill and is screened to remove light weight contaminants
like feathers and leaves prior to mixing.
by mail for less
A new service offers
direct mail shipment anywhere in the 48 states, Alaska or Hawaii of 514 cubic
deaired Helmer based porcelain for $29.45 per box (yes, that's the total
price...($16.00 for the clay plus $13.45 for insured shipping). This is a true
Helmer body good for oxidation, reduction and especially for wood fire since it
flashes the characteristic orange. I have also fired this body to cone 11 and
even on occasion, 12. For long duration firings, it would be a good idea to test
a few pieces prior to committing to full scale use.
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Kaolin (a white sedimentary clay
replacement for Avery in pottery) Free samples (1000 g) are supplied upon
receipt of the cost of shipping only, limit one request per address.
Additional amounts now available for $20.00 for 20 lbs of 10 mesh dry Helmer
shipped anywhere in the 48 states, Alaska or Hawaii.
Analysis ( XRF by ALS CHEMEX http://www.alschemex.com)
CaO MgO K2O
LOI (loss on ignition) Total
0.26 0.53 0.08
Screen Analysis* (as performed on a Ro Tap multilevel screen)
H30 Screen mesh
+20 -20 +
80 -80 + 150
Air Float Screen mesh
-140 + 200 -200 + 400
screen data reflects actual O.S. remaining on screen after water washing (Tyler
std. screens were used).
efficiency varies with the dryness of the clay, the relative humidity and the
ambient air temperature. This analysis was done on air dried clay (approximately
7-8% residual moisture) at 50% relative humidity and an air temperature of 72
degrees Fahrenheit in the same hammermill we use to process all the clay for
sale. Screen mesh is 8 mesh. This is for informational purposes only and is not
a guarantee of grind properties. Wet processing shows that nearly 99% of
the clay will pass through a 325 mesh screen when fully dispersed in water.
Description of deposit and mining method
is sedimentary in origin. This block covers 600 acres and is accurately bore
holed on 50 foot centers. This one lens contains 1.6 million tons of the clay
with the listed composition. It is situated at the far end of an ancient dry
lake bed which constitutes much of the white clay in the Helmer-Bovill region of
Idaho. Clays nearer to Bovill are higher in silica and feldspar and are coarser
grained. Those at the Helmer end are very fine grained and almost devoid of
fluxes or free silica. The dark color seen in the dry clay is organic matter.
Fired color is white with an iron blush coming from the colloidal iron found in
the clay. For porcelain use, we have found that the clay can be made into a thin
slurry with water (no deflocculents) and passed over powerful magnets
repeatedly until no more iron is noted. This removes the iron staining and makes
a much whiter fired color in the porcelain.
The clay is
mined in July and August each year. Overburden is stripped off the top of the
clay and set aside. The clay is mined along a vertical face to a depth 6 inches
above where the sand deposit is. The clay is spread on the cleaned area and
plowed repeatedly to air dry it to about 10-12% moisture. It is then hauled to
Lewiston, Idaho where we finish drying it to the 7-8% moisture level. Because it
is surrounded by forest lands, we routinely see leaves, wood, grass and some
rocks in the clay which are introduced after the clay is mined. A new dust
collector on the roll mill has totally eliminated all tramp in the downline
grind circuit. This is the most tramp free Helmer has ever been and we are very
pleased to have spent the money on the added equipment. For those with the
equipment, fluid processing can remove all the unwanted fine
organics on your end very easily and this helps keep your cost low. You can
specify a 20 mesh screen run if you let us have some lead time at no additional
cost. Later this year, we are adding a Universal Mill which can grind to 325
mesh so if you want airfloat, it will soon be available as needed.
offer multiple packaging levels. You can order Helmer in 1, 5, 10, 25 and 50 lb
bags. We also ship 1800 lb Helmer in a Super Sack on a pallet for customers
who want to avoid the disposal of multiwall kraft bags. This option is
especially good for resellers who repackage Helmer for resale in smaller
quantities. Super sack prices are $40.00/ton less than bagged clay.
bagged price is as listed below:
tons >3 tons
30 mesh 1.50
2.50 3.50 6.00
3.50 4.50 10.00
Now available in limited
float is the dust collector fraction and as such represents about 5% of the
total capacity. For this reason, large quantities are not available. Air float
is best suited for applications where fluid slipping and wet screening are
inconvenient or impossible and large quantities are not needed such as in glaze
Universities may use purchase orders. All other purchases are cash, check or
bank card except for well rated resellers who qualify for net 30 day terms.
Always call ahead to assure that the clay will be ready when you need it. We
only mine 500 tons per year and once it is gone, there is no more until the next
mining season, so plan ahead.
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