Jami Luong on thu 17 sep 09
Dear All ClayArters:
For years now, I have been calculating my glaze costings without any trou=
=3D
ble:=3D20
How I have been doing it, is calculating the cost per batch of glaze then=
=3D
=3D20
breaking that cost down into a per gram cost.
I would then guesstimate how much glaze I used on a pot and multiplied th=
=3D
e=3D20
estimated gram amount by my per gram cost.
Now, I would like to be a bit more precise about this calculation and fig=
=3D
ure out=3D20
exactly how much of the glaze I put on each item.
One thought I had was weighing the bucket before dipping the pot and=3D20
weighing it after. However, the failing in this method is trying to meas=
=3D
ure the=3D20=3D20
gram liquid weight lost when the original per batch costings were based o=
=3D
n dry=3D20
material batches of a certain amount (lets say 3kg). Surely, that wouldn=
=3D
't=3D20
work, right? Comparing liquid weight to dry?
Another idea would be to weigh the full batch of glaze when mixed as a li=
=3D
quid=3D20
(to the appropriate specific gravity) before it is ever used - to get the=
=3D
total=3D20
liquid glaze weight for that batch. Then, when I did do a weighing befor=
=3D
e and=3D20
after dipping a pot, I would then be comparing two liquid weights. The l=
=3D
oss in=3D20
liquid grams could then be calculated.
The calculation alludes me.=3D20
Is there anyone out there who can assist in this final step of costing th=
=3D
e glaze=3D20
that is actually on a pot?
Thanks in advance for your help!!
Sincerely,
Jami Luong
jmlpottery
Steve Slatin on thu 17 sep 09
You're trying to do it the hard way.
The (much!) easier way is to weigh
the pot immediately prior to applying
the glaze, then glaze, then let it sit
for long enough to dry very thoroughly,
then weigh the pot again. The difference
is the sum of the glaze plus a little
water acquired by the pot. If you
want to eliminate this part (it's small,
I checked it once) you can simultaneously
apply plain water to a bisqued pot, and
wait as long to re-weigh.
Steve Slatin --=3D20
--- On Thu, 9/17/09, Jami Luong wrote:
> From: Jami Luong
> Subject: Convert per gram cost of glaze into cost of glaze on a pot
> To: Clayart@LSV.CERAMICS.ORG
> Date: Thursday, September 17, 2009, 6:44 AM
> Dear All ClayArters:
> For years now, I have been calculating my glaze costings
> without any trouble:=3D20
> How I have been doing it, is calculating the cost per batch
> of glaze then=3D20
> breaking that cost down into a per gram cost.
> I would then guesstimate how much glaze I used on a pot and
> multiplied the=3D20
> estimated gram amount by my per gram cost.
>=3D20
> Now, I would like to be a bit more precise about this
> calculation and figure out=3D20
> exactly how much of the glaze I put on each item.
>=3D20
> One thought I had was weighing the bucket before dipping
> the pot and=3D20
> weighing it after.=3DA0 However, the failing in this
> method is trying to measure the=3DA0=3D20
> gram liquid weight lost when the original per batch
> costings were based on dry=3D20
> material batches of a certain amount (lets say 3kg).=3DA0
> Surely, that wouldn't=3D20
> work, right?=3DA0 Comparing liquid weight to dry?
>=3D20
> Another idea would be to weigh the full batch of glaze when
> mixed as a liquid=3D20
> (to the appropriate specific gravity) before it is ever
> used - to get the total=3D20
> liquid glaze weight for that batch.=3DA0 Then, when I did
> do a weighing before and=3D20
> after dipping a pot, I would then be comparing two liquid
> weights.=3DA0 The loss in=3D20
> liquid grams could then be calculated.
>=3D20
> The calculation alludes me.=3D20
> Is there anyone out there who can assist in this final step
> of costing the glaze=3D20
> that is actually on a pot?
>=3D20
> Thanks in advance for your help!!
>=3D20
> Sincerely,
> Jami Luong
> jmlpottery
> =3D0A=3D0A=3D0A
The Hendriks on thu 17 sep 09
Why not weigh the actual pot before glazing and after? let it dry if you ar=
=3D
e calculating dry glaze cost...
***
Eleanor Hendriks
Elan Fine Pottery
http://eleanorhendriks.blogspot.com
www.StudioElan.etsy.com
----------------------------------------
> Date: Thu=3D2C 17 Sep 2009 09:44:26 -0400
> From: jamiluong@GMAIL.COM
> Subject: Convert per gram cost of glaze into cost of glaze on a pot
> To: Clayart@LSV.CERAMICS.ORG
>
> Dear All ClayArters:
> For years now=3D2C I have been calculating my glaze costings without any =
tr=3D
ouble:
> How I have been doing it=3D2C is calculating the cost per batch of glaze =
th=3D
en
> breaking that cost down into a per gram cost.
> I would then guesstimate how much glaze I used on a pot and multiplied th=
=3D
e
> estimated gram amount by my per gram cost.
>
> Now=3D2C I would like to be a bit more precise about this calculation and=
f=3D
igure out
> exactly how much of the glaze I put on each item.
>
> One thought I had was weighing the bucket before dipping the pot and
> weighing it after. However=3D2C the failing in this method is trying to m=
ea=3D
sure the
> gram liquid weight lost when the original per batch costings were based o=
=3D
n dry
> material batches of a certain amount (lets say 3kg). Surely=3D2C that wou=
ld=3D
n't
> work=3D2C right? Comparing liquid weight to dry?
>
> Another idea would be to weigh the full batch of glaze when mixed as a li=
=3D
quid
> (to the appropriate specific gravity) before it is ever used - to get the=
=3D
total
> liquid glaze weight for that batch. Then=3D2C when I did do a weighing be=
fo=3D
re and
> after dipping a pot=3D2C I would then be comparing two liquid weights. Th=
e =3D
loss in
> liquid grams could then be calculated.
>
> The calculation alludes me.
> Is there anyone out there who can assist in this final step of costing th=
=3D
e glaze
> that is actually on a pot?
>
> Thanks in advance for your help!!
>
> Sincerely=3D2C
> Jami Luong
> jmlpottery
_________________________________________________________________
New! Open Messenger faster on the MSN homepage
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Craig Martell on thu 17 sep 09
Hello Jami:
I don't think you need to worry about liquid weight. Water is not a factor
in cost, just the weight of dry ingredients.
What I've done is similar to your methods but I figure glaze costs by a
series of pots. I first figure the per pound/or gram cost of the glaze. I
will then weigh a series of bisqued pots, for instance maybe 10 mugs, and
record the weight of each piece. Then glaze the pots and let them dry
completely, weigh them again and the difference is the weight of applied
glaze. I then average the cost of glaze between the 10 mugs and use this
as the cost.
The big problem is using multiple glazes on pots, which is what I do
now. It's almost impossible to figure that cost.
regards, Craig Martell Hopewell, Oregon
Rudy Tucker on thu 17 sep 09
--=3D=3D=3D=3D=3D=3D=3DAVGMAIL-6EF55AB5=3D=3D=3D=3D=3D=3D=3D
Content-Type: text/plain;
format=3Dflowed;
charset=3D"Windows-1252";
reply-type=3Doriginal
Content-Transfer-Encoding: 7bit
Jami,
It seems to me that if you want to know how much glaze is on a particular
form of a particular size (a mug for example) it should be rather simple.
Can't you weigh the completely dry mug before glazing? Then completely dry
the glazed mug and weigh again. The difference between the two weights will
be the amount of glaze without the water. Multiply by your cost per gram.
Or did I misread your post?
Rudy
----- Original Message -----
From: "Jami Luong"
To:
Sent: Thursday, September 17, 2009 9:44 AM
Subject: Convert per gram cost of glaze into cost of glaze on a pot
>Now, I would like to be a bit more precise about this calculation and
>figure out
exactly how much of the glaze I put on each item.<
>Is there anyone out there who can assist in this final step of costing the
>glaze
that is actually on a pot?<
Sincerely,
Jami Luong
jmlpottery
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Bill Hall on thu 17 sep 09
You're almost there. Just weigh the empty bucket, then mix the batch of =3D
glaze and weigh that. Subtract those two weights, and you have the =3D
weight of the liquid batch. Now, just divide the cost of the batch of =3D
glaze by its liquid weight. That will give you the cost of one gram of =3D
liquid glaze. Then do what you said, weigh the bucket of glaze before =3D
and after dipping the pot and multiply by the cost of a gram of liquid =3D
glaze.
----- Original Message -----=3D20
From: Jami Luong=3D20
To: Clayart@LSV.CERAMICS.ORG=3D20
Sent: Thursday, September 17, 2009 8:44 AM
Subject: Convert per gram cost of glaze into cost of glaze on a pot
Dear All ClayArters:
For years now, I have been calculating my glaze costings without any =3D
trouble:=3D20
How I have been doing it, is calculating the cost per batch of glaze =3D
then=3D20
breaking that cost down into a per gram cost.
I would then guesstimate how much glaze I used on a pot and multiplied =
=3D
the=3D20
estimated gram amount by my per gram cost.
Now, I would like to be a bit more precise about this calculation and =3D
figure out=3D20
exactly how much of the glaze I put on each item.
One thought I had was weighing the bucket before dipping the pot and=3D20
weighing it after. However, the failing in this method is trying to =3D
measure the =3D20
gram liquid weight lost when the original per batch costings were =3D
based on dry=3D20
material batches of a certain amount (lets say 3kg). Surely, that =3D
wouldn't=3D20
work, right? Comparing liquid weight to dry?
Another idea would be to weigh the full batch of glaze when mixed as a =
=3D
liquid=3D20
(to the appropriate specific gravity) before it is ever used - to get =3D
the total=3D20
liquid glaze weight for that batch. Then, when I did do a weighing =3D
before and=3D20
after dipping a pot, I would then be comparing two liquid weights. =3D
The loss in=3D20
liquid grams could then be calculated.
The calculation alludes me.=3D20
Is there anyone out there who can assist in this final step of costing =
=3D
the glaze=3D20
that is actually on a pot?
Thanks in advance for your help!!
Sincerely,
Jami Luong
jmlpottery
Snail Scott on thu 17 sep 09
On Sep 17, 2009, at 8:44 AM, Jami Luong wrote:
> Is there anyone out there who can assist in this final step of costing
> the glaze
> that is actually on a pot?
Weigh the bisque, glaze, then when it has dried
throughly, weigh it again and subtract the bisque
weight. That should be the weight of the glaze
materials, and you know the cost of those and their
proportion in the recipe. Unless you pay a lot for
water, the liquid weight should never be relevant.
-Snail
Chris Campbell on fri 18 sep 09
> Now, I would like to be a bit more precise
> about this calculation and figure out
> exactly how much of the glaze I put on each item.
I hate to sound too business like here ...
BUT ... I think I need to shout ...
the MOST EXPENSIVE ITEM in your studio
is YOUR TIME!
The hours you spend trying all these ideas could
easily be converted into twelve extra pots.
HMMMM .... 12 x $30 =3D $360
glaze per sq cm .... 02 cents
Unless of course this is the kind of calculation
you like to do to relax.
Chris Campbell - in North Carolina
Chris Campbell Pottery LLC
Designs in Colored Porcelain
9417 Koupela Drive
Raleigh NC 27615-2233
919-215-8644
Fax: 919-676-2062
www.ccpottery.com
http://neriagechris.blogspot.com/
Elizabeth Priddy on fri 18 sep 09
This may be an issue depending on just how many pots they make per yearand =
=3D
if there is a very valuable component to their glaze.
Most glaze ingredients are dirt cheap, but there are bits and pieces that=
=3D
=3DA0could break your budget if you needed a lot of it, especially pigments=
. =3D
=3DA0I remember when cobalt=3DA0was prohibitive and there was not a good su=
bsti=3D
tute=3DA0( I have been doing pottery for 24 years!).
I could easily imagine a china painter using some lustres or gold based col=
=3D
orthat would have to deal with the cost of it in a large order or piece.
Elizabeth Priddy
=3D0ABeaufort, NC - USA
=3D0A
=3D0AWorkshops and pottery online at: http://www.elizabethpriddy.com
=3D0A
=3D0APersonal Blog: http://open.salon.com/user_blog.php?uid=3D3D943
=3D0A
=3D0ANatural Instincts Conference Information:
=3D0Ahttp://downtothepottershouse.com/NaturalInstincts.html
=3D0A
=3D0AKiln pictures and such: http://www.flickr.com/photos/7973282@N03/
--- On Fri, 9/18/09, Chris Campbell wrote:
From: Chris Campbell
Subject: Re: Convert per gram cost of glaze into cost of glaze on a pot
To: Clayart@LSV.CERAMICS.ORG
Date: Friday, September 18, 2009, 11:33 AM
> Now, I would like to be a bit more precise
> about this calculation and figure out
> exactly how much of the glaze I put on each item.
I hate to sound too business like here ...
BUT ... I think I need to shout ...
the MOST EXPENSIVE ITEM in your studio
is YOUR TIME!
The hours you spend trying all these ideas could
easily be converted into twelve extra pots.
=3D0A=3D0A__________________________________________________=3D0ADo You Yah=
oo!?=3D
=3D0ATired of spam? Yahoo! Mail has the best spam protection around =3D0Ah=
ttp:=3D
//mail.yahoo.com
Chris Campbell on fri 18 sep 09
>
This may be an issue depending on just
> how many pots they make per year and if
> there is a very valuable component to their glaze.
Perhaps, but determining how many ounces of glaze
fall on each varied piece is definitely for those who are
into math and love to do these problems for relaxation.
I don't think knowing this would make a significant
difference in cost calculations.
Even then a person could lose their mind factoring
in relative humidity, true bisque temperature, consistency
of the ingredients in the clay and glaze, exact dipping
times, exact absorbency, how much they clean from the
bottom, what falls off if your arm brushes against it when
it is dry ... never mind pesky glaze drips!
Chris Campbell - in North Carolina
Elizabeth ... can't believe your baby is off to school!
Good thing the rest of us are not getting any older.
Chris Campbell Pottery LLC
Designs in Colored Porcelain
9417 Koupela Drive
Raleigh NC 27615-2233
919-215-8644
Fax: 919-676-2062
www.ccpottery.com
http://neriagechris.blogspot.com/
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