Purplelama Earthlink on tue 19 apr 11
This is one of my favorite glazes so i decided to make a 10,000g batch. I w=
a=3D
s distracted when I added the neph sy and looked at the line above it and a=
d=3D
ded more than 4 times the amount of neph sy. I'd have to mix the glaze in a=
t=3D
rash can to bring the other chemicals to the correct proportions, something=
I=3D
'm not going to do. So the question is do I throw away what I have weighed =
o=3D
ut so far or make the glaze with the neph sy way out of proportion?
Thanks
Shula
Sent from my iPhone=3D
John Post on tue 19 apr 11
Here is an almost simple solution...
Right now you have a bucket that has some ingredients in it along with
4x as much nepheline syenite.
Take all of the stuff that is currently in the bucket and mix it up
and sieve it like you usually would.
Then get four translucent buckets that are the same size and fill them
until they all look equal as gauged by your eye.
What you will end up with is 4 buckets that have the correct amount of
Neph sy for a 10,000 gram batch.
The other ingredients you put in your original batch will only have
1/4 of the correct amount for the 10,000 gram batch. So you will have
to multiply each of these materials by .75 and add that amount of each
one to one of the 4 buckets. This bucket will become your new 10000
gram batch bucket. Then any ingredient that you did not put into your
first incorrect 10,000 gram batch will need to be added as its full
amount.
At the end of this process you will end up with one batch of glaze
that has the correct amount of neph sy and all of the other ingredients.
You will also have three other batches that have the correct amount of
neph sy for a 10,000 gram batch and 1/4 of the amount of other
chemicals that were already added. You could then save these for use
in the future or explore other color variations with these using the
same process above and then adding different colorants.
It's kind of wordy, but I hope it makes sense. If not, let me know
and I will try to obfuscate it a bit more...
John Post
Sterling Heights, Michigan
http://www.johnpost.us
Follow me on Twitter
https://twitter.com/UCSArtTeacher
On Apr 19, 2011, at 5:07 PM, Purplelama Earthlink wrote:
> This is one of my favorite glazes so i decided to make a 10,000g
> batch. I was distracted when I added the neph sy and looked at the
> line above it and added more than 4 times the amount of neph sy. I'd
> have to mix the glaze in a trash can to bring the other chemicals to
> the correct proportions, something I'm not going to do. So the
> question is do I throw away what I have weighed out so far or make
> the glaze with the neph sy way out of proportion?
>
> Thanks
>
> Shula
>
> Sent from my iPhone
John Rodgers on tue 19 apr 11
I use that glaze a lot. I usually make 16 gallons at a time. It keeps
well over time, why not just balance the chemicals for the glaze and use
it? I find dipping in the 16 gallon vat makes for extremely easy glazing
for pots, bowls, pitchers, mugs. I prefer spraying for glazing plate,
though they could be dipped.
John
John Rodgers
Clayartist and Moldmaker
88'GL VW Bus Driver
Chelsea, AL
Http://www.moldhaus.com
On 4/19/2011 4:07 PM, Purplelama Earthlink wrote:
> This is one of my favorite glazes so i decided to make a 10,000g batch. I=
was distracted when I added the neph sy and looked at the line above it an=
d added more than 4 times the amount of neph sy. I'd have to mix the glaze =
in a trash can to bring the other chemicals to the correct proportions, som=
ething I'm not going to do. So the question is do I throw away what I have =
weighed out so far or make the glaze with the neph sy way out of proportion=
?
>
> Thanks
>
> Shula
>
> Sent from my iPhone
>
Snail Scott on tue 19 apr 11
On Apr 19, 2011, at 4:07 PM, Purplelama Earthlink wrote:
> ...do I throw away what I have weighed out so far or make the glaze =3D
with the neph sy way out of proportion?
First: throwing out some dry materials is wasteful,=3D20
but not nearly as wasteful as ruining your work with=3D20
a bad glaze. Don't waste time and effort on this=3D20
instead of making a new batch if here is any chance=3D20
of it not coming out right. Few glaze materials=3D20
are worth even a fraction of your labor's value.
Second: if you really want to save it, make up the full
jumbo-sized batch, in DRY form: much easier to store=3D20
than liquid glaze. Then when you need more, just=3D20
scoop out any amount of the mix and add water! If it=3D20
is indeed a favorite, you'll use it up eventually, and=3D20
maybe pretty soon. =3D20
=3D20
-Snail
>=3D20
> Thanks
>=3D20
> Shula
>=3D20
> Sent from my iPhone
Sharon Wetherby on wed 20 apr 11
I think I'd mix the jumbo-sized batch and dry mix it really well. Then I'd
keep an adequate amount
for my use and bag/sell small batches (like maybe 5-lb bags or more) of the
remainder to my friends.
Sharon
Fort Worth, TX
>>>>>>>>>>>>>
Date: Tue, 19 Apr 2011 22:12:58 -0500
From: Snail Scott
claywork@FLYING-SNAIL.COM
Subject: Re: Mc6g variegated slate blue
On Apr 19, 2011, at 4:07 PM, Purplelama Earthlink wrote:
> ...do I throw away what I have weighed out so far or make the glaze
with the neph sy way out of proportion?
First: throwing out some dry materials is wasteful,
but not nearly as wasteful as ruining your work with
a bad glaze. Don't waste time and effort on this
instead of making a new batch if there is any chance
of it not coming out right. Few glaze materials
are worth even a fraction of your labor's value.
Second: if you really want to save it, make up the full
jumbo-sized batch, in DRY form: much easier to store
than liquid glaze. Then when you need more, just
scoop out any amount of the mix and add water! If it
is indeed a favorite, you'll use it up eventually, and
maybe pretty soon.
-Snail
Ron Roy on wed 20 apr 11
Hi Shula,
Send me the recipe you weighed out and I'll run it through my glaze
calculator - Perhaps I can then tell you what it may look like and/or
what is needed to make it good again.
RR
Quoting Purplelama Earthlink :
> This is one of my favorite glazes so i decided to make a 10,000g
> batch. I was distracted when I added the neph sy and looked at the
> line above it and added more than 4 times the amount of neph sy. I'd
> have to mix the glaze in a trash can to bring the other chemicals to
> the correct proportions, something I'm not going to do. So the
> question is do I throw away what I have weighed out so far or make
> the glaze with the neph sy way out of proportion?
>
> Thanks
>
> Shula
>
> Sent from my iPhone
John Britt on wed 20 apr 11
The recipe I have is:
Mc6 Variegated Slate Blue:
HIGH CALCIUM MATTE cone 6
20.01=3D09Ferro 3195=3D20
29.00=3D09Wollastonite=3D20
4.00=3D09Nepheline Syenite=3D20=3D20
30.00 EPK China Clay=3D20
17.00 Silica=3D20
with 1.25% Cobalt Carbonate
3.0% Copper Carbonate
5.0 % Rutile
Hope it helps,
www.johnbrittpottery.com
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