Carrie or Peter Jacobson on thu 16 mar 00
Somewhere in the archives is a chart that details what you can make from 25
lbs. of clay. I don't recall exactly, but it's along the order of 25
teacups, 20 mugs, etc. Look under "25 lbs of clay" or perhaps someone has it
handy and can send it?
I have posted this chart in the studio, and send students to look at it when
they ask me how much clay they should use. I always tell them the chart is a
guide, something to keep in mind, not something to measure themselves
against.
It is difficult, I think, to find that right
weight/height/thickness/thinness ratio. Takes time and some idea of what
road you want to travel.
Carrie
Still in Connecticut
judy motzkin on thu 16 mar 00
Mike,
Size of thrown piece and weight will be particular to
your form and throwing style.
I think it best to learn through process, absorb the
experience, make it intuitive.
So here's an exercise toward that end:
Weigh out and wedge clay in 1/2 pound increments, and
throw the same form in graduated sizes. You will learn
how much clay works for what size in your bones, forever.
Keep the thrown pieces as a reference until you trust
your experience.
jem
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Catherine Jarosz on fri 17 mar 00
Hi been sorta peeking at this thread here and there.... havent seen any
mention of something I found extremely useful for weights when I was
starting out... not so much for a beginner thrower but for a beginner
functional potter... this was Robin Hoppers functional pottery book ... it
has a chart somewhere in that book about what he uses to throw different
things and even gives out measurements... I copied that page down and
placed it on the wall in front of my wedging table and baby scales... it was
a great place to start with and of course thru the yrs those weights and
measurements changed as my skills improved or my forms changed and I try
to write the new one each time to keep it as current as possible...
this is a great book to have and I highly reccommend it to you to either
buy out right or get to your local library ... I found this one at the
local university that also happens to have a ceremic dept so got lucky heck
didnt know it even existed ... was pretty poor then so couldnt have
purchased it on a lark ... just luckily stumbled onto it :o) what a find...
hope this helps some ... cat
Dr.Tom Roess on sat 25 mar 00
------------------
Mike, In all the replies to your request for clay weights to make specific
pieces I didn't see anything that I felt answered your question
straightforwardly. So I'm sending you the following:
Print this out, cut on the dotted lines and line up the four columns. I
converted the clay weights from metric to pounds and ounces, but not the
volumes. I hope this is what you were looking for.
Regards, Lou
Item
Flat-based forms
Mug
Jug
Jug
Jug
Jug
Side plate
Dinner plate
Teapot
Teapot
Casserole dish
Casserole dish
Casserole dish
Storage jar
Storagc jar
Storage jar
Curved-base forms (turning required)
Cup
Saucer
Bowl
Bowl
Bowl
Dish or plate
Platter
Platter
Casserole lids
Storage-jar lids
Note: Plain, narrow
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D==
3D=3D=3D
WEIGHTS AND
Approx size- fired
200ml
225 ml
500 ml
1 L
2 L
17 cm wide
25 cm wide
4 cup
6 cup
1L
2L
3L
500 ml
1 L
2 L
10 cm wide
17 cm wide
l5 cm wide
25 cm wide
30 cm wide
25 cm wide
30 cm wide
40 cm wide
(30-100=25 of pot
weight)
(20-65=25 of pot
weight)
lids need least.
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D==
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
MEASURES
Approximate
Clay weight (gms)
280
350
500
1000
1800
570
1100
680
1100
1150
1900
2250
520
1050
1850
350
650
550
1500
2500
1400
2250
4750
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D==
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Approximate clay weight (lbs =26 ozs)
9 oz
12 oz
1 lb 2 oz
2 lb
4 lb
1 1/4 lb
2 1/2 lb
1 1/2 lb
2 1/2 lb
2 1/2 lb
4 lb
5 lb
1 1/4 lb
2 1/4 lb
4 lb
12 oz
1 1/2 lb
1 1/4 lb
3 1/4 lb
5 1/2 lb
3 lb
5 lb
10 1/2 lb
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D==
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3=
D=3D=3D=3D=3D
Jeff van den Broeck on sun 2 apr 00
Dear Doctor Tom Roess,
What a pity you converted the clay weights to pounds and ounces. Perhaps
it's convenient for Mike, but as a non british European, grown up with the
decimal system I would very much appreciate if you could still communicate
the column of the approximate weights in kilos and grammes.
It seems pointless to start converting again pounds and ounces to grammes.
As in translations the result of the second conversion could be
surprisingly different from the original.
Many thanks, Jeff
Jeff van den Broeck - P.O.Box 1099
Baguio City 2600 - Philippines
jvdb@skyinet.net
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