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WasteNotWantNot

Main.WasteNotWantNot History

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November 17, 2018, at 09:51 AM by 76.248.208.245 -
Deleted line 0:
Added lines 53-54:

Waste Glazes may not be appropriate for food surfaces.
November 17, 2018, at 09:50 AM by 76.248.208.245 -
Added lines 1-3:

Written in the 1990's

Changed lines 5-6 from:
Don't waste good pots with bad glazes.
to:
Don't waste good pots with bad glazes. 
Added lines 48-52:

2018 note

I now generally separate out one quart from 4 gallons of scrap and test alterations on the small quantity. Occasionally I make a low grade iron oxide from roasted rust I use that sometimes. I also have some odd lots of colorants from donations from local studios. I use those sometimes. I am now almost routinely using my soluble removing procedure from scraps. If there is much soda ash in the scrap it vastly reduces its usability.

Deleted lines 54-57:
Thanks

Louis Katz
edited 2016
March 23, 2016, at 11:34 PM by 76.248.208.103 -
Added line 50:
edited 2016
March 23, 2016, at 11:34 PM by 76.248.208.103 -
Changed lines 37-38 from:
Scrap materials build up fast and fixing five gallon buckets has become too much work. It seems that with good reclamation about 15 gallons of scrap glaze appear semester down here at the Island University. I am beginning this semester to fix the scrap glaze in 15 gallon quantities. We get the buckets from community swimming pools. They get pool chemicals in them. The buckets come with nice screw down plastic lids.
to:
Scrap materials build up fast and fixing five gallon buckets has become too much work. It seems that with good reclamation about 15 gallons of scrap glaze appear semester down here at the Island University. I am beginning this semester to fix the scrap glaze in 15 gallon quantities. We get the buckets from community swimming pools. They get pool chemicals in them. The buckets come with nice screw down plastic lids. The buckets contained very hazardous stuff, keep it out of your eyes and don't breath it. Read the labels.
Changed line 44 from:
The key to recycling is to spend you efforts where they will do the most good. If a  batch of scrap just won't work, throw it away, and concentrate your efforts more productively on a batch that looks promising. If a batch looks like it will require a large alteration to make it work, throw it away. Teach your students to use a spatula to recover glazes from pouring containers and ladles. Back to the studio.....,
to:
The key to recycling is to spend you efforts and materials where they will do the most good. If a  batch of scrap just won't work, throw it away, and concentrate your efforts more productively on a batch that looks promising. If a batch looks like it will require a large alteration to make it work, throw it away. Teach your students to use a spatula to recover glazes from pouring containers and ladles. Back to the studio.....,
March 23, 2016, at 11:31 PM by 76.248.208.103 -
Changed lines 23-24 from:
I applaud your desire to conserve resources, protect the environment, save money and avoid violating the first principle (never throw anything away ). My first experience with recycled glaze ingredients was when my job was to empty a fifteen gallon trap built into the floor at the University of Michigan in 5734 (1974). This material without any alterations was an acceptable cone ten semi-matte black. If I remember correctly we called it Scrap Black. It was not very popular, it might still be there..
to:
I applaud your desire to conserve resources, protect the environment, save money and avoid violating the first principle (never throw anything away ). My first experience with recycled glaze ingredients was when my job was to empty a fifteen gallon trap built into the floor at the University of Michigan in 5735 (1975). This material without any alterations was an acceptable cone ten semi-matte black. If I remember correctly we called it Scrap Black. It was not very popular, it might still be there..
Changed line 31 from:
Runny glazes that craze get additions of clay; sometimes a ball clay, sometimes kaolin, occasionally a red clay. I use additions of about 2 pounds to five gallons. I don't bother weighing it. Glazes that craze but are not runny get silica straight up or talc and silica. I use the talc when I am short on matt glazes in the studio. Scrap that doesn't seem quite melted usually gets whiting or dolomite, or occasionally plastic vitrox.
to:
Runny glazes that craze get additions of clay; sometimes a ball clay, sometimes kaolin, occasionally a red clay. I use additions of about 2 pounds to five gallons. I don't bother weighing it. Glazes that craze but are not runny get silica straight up or talc and silica. I use the talc when I am short on matt glazes in the studio. Scrap that doesn't seem quite melted usually gets whiting or dolomite, or occasionally plastic vitrox (we are long on this material).
December 28, 2015, at 10:21 AM by 76.248.208.103 -
Changed line 6 from:
""Dear Doctor,
to:
Dear Doctor,
Changed line 18 from:
To the Rim in Arizona, ""
to:
To the Rim in Arizona,
December 28, 2015, at 10:20 AM by 76.248.208.103 -
Changed line 6 from:
''Dear Doctor,
to:
""Dear Doctor,
Changed line 18 from:
To the Rim in Arizona, ''
to:
To the Rim in Arizona, ""
December 28, 2015, at 10:20 AM by 76.248.208.103 -
Changed lines 4-7 from:
Ask the Doctor:
Preventative Medicine
"Waste Not"
Dear Doctor,
to:
!!!Ask the Doctor:Preventative Medicine
!!!"Waste Not"
''Dear Doctor,
Changed line 18 from:
To the Rim in Arizona,
to:
To the Rim in Arizona, ''
December 28, 2015, at 10:18 AM by 76.248.208.103 -
Added lines 1-3:
Waste Glazes may not be appropriate for food surfaces.
Don't waste good pots with bad glazes.

December 27, 2015, at 09:43 PM by 76.248.208.103 -
Changed line 1 from:
[=Ask the Doctor:
to:
Ask the Doctor:
Changed lines 5-6 from:
I goofed mixing a bucket of a glaze wrong. I apparently switched recipes
mid-stride. Can you help me find a use for this runny green glop.
to:
I goofed mixing a bucket of a glaze wrong. I apparently switched recipes mid-stride. Can you help me find a use for this runny green glop.
Added line 8:
Changed lines 10-14 from:
***Dear Doctor,
Our glaze area sink does not have a trap, so we have been washing
brushes, buckets and other glazing tools in trash cans filled with water.
The second can is almost filled. I would hate to throw away this
material. What should I do?
to:

Dear Doctor,
Our glaze area sink does not have a trap, so we have been washing brushes, buckets and other glazing tools in trash cans filled with water. The second can is almost filled. I would hate to throw away this material. What should I do?
Changed lines 15-86 from:
To the Rim in Arizona,
Dear Oops and ***Rim,
I applaud your desire to conserve resources, protect the environment,
save money and avoid violating the first principle (never throw anything
away ). My first experience with recycled glaze ingredients was when my
job was to empty a fifteen gallon trap built into the floor at the
University of Michigan in 5734 (1974). This material without any
alterations was an acceptable cone ten semi-matte black. If I remember
correctly we called it Scrap Black. It was not very popular, it might
still be there..
My next experience was while my wife was teaching at University of
Missouri, Columbia. We had inherited a good deal of glaze remnants with
little documentation and a five gallon trap full of glaze material. We
mixed it all together and developed a few glazes with these materials.
Named "Moonlight over Montana" and other colorful names these firing
sensitive glazes with complexly colored and surfaces were studio
favorites until they ran out.
In the Island University studio I segregate the clay washing sink from
the glaze sink. This limits the variation in the scrap and insures that
the glaze scrap will at least come close to melting. It also limites the
amount of red clay in the scrap and keeps the scrap glaze from always
being a tenmoku. It is a good idea when possible to keep glaze scrap
separated by temperature. Since we fire most everything to cone 10 this
is not a problem for us.
When altering the glaze scrap I try to use only inexpensive ingredients,
and only those that are O.K. to dispose of in landfills. I mix and sieve
the scrap and test it in our normal firing cycle. If the scrap has chunks
in it that don't want to mix in I throw the chunks away.
Runny glazes that craze get additions of clay; sometimes a ball clay,
sometimes kaolin, occasionally a red clay. I use additions of about 2
pounds to five gallons. I don't bother weighing it. Glazes that craze but
are not runny get silica straight up or talc and silica. I use the talc
when I am short on matt glazes in the studio. Scrap that doesn't seem
quite melted usually gets whiting or dolomite, or occasionally plastic
vitrox.
I favor red iron oxide, and rutile as colorants to add to scrap glazes.
For five gallons I use about 250 grams (1/4 pound). When the scrap glazes
start to build up however, some cobalt carbonate will increase usage. If
the glaze is not already too dark, cobalt carbonate 100 grams should make
a big difference in five gallons of glaze. With cobalt's cost, it better
make a difference. I usually  prefer to use the big dollar colorants in
tested glazes.
A common fault of these scrap materials is over-floculation. This is
often caused by an excess of soluble ingredients in the scrap.
Over-floculation can cause crawling. To wash out the soluble salts, split
the materials into a few 1/4 full buckets. Add water until full, stir and
let the scrap settle out. Throw the water from the top of the buckets
away. If the problem is severe, wash the materials twice.
***Scrap materials build up fast and fixing five gallon buckets has
become too much work. It seems that with good reclamation about 15
gallons of scrap glaze appear semester down here at the Island
University. I am beginning this semester to fix the scrap glaze in 15
gallon quantities. We get the buckets from community swimming pools. They
get pool chemicals in them. The buckets come with nice screw down plastic
lids.
***When a glaze looks especially nice, or I do a good demonstration pot
with it, it gets used quickly. The students know there will be no more.
When I am demonstrating glazing or onglaze decorating I often use an
unpopular scrap glaze, and wash the pot off afterward, so I can use the
bisqueware again.
***Gail Busch, my wife, always washes her sigillata brushes in the same
cup of distilled water. Her scrap sig usually comes out a gray blue
green.. Scrap Raku glazes usually need no alteration,. and have been our
most popular surfaces. If they don't look good try adding copper
carbonate.
The key to recycling is to spend you efforts where they will do the most
good. If a a batch of scrap just won't work, throw it away, and
concentrate your efforts more productively on a batch that looks
promising. If a batch looks like it will require a large alteration to
make it work, throw it away. Teach your students to use a spatula to
recover glazes from pouring containers and ladles.
Back to the studio.....,
to:

To the Rim in Arizona,


Dear Oops and  Rim,

I applaud your desire to conserve resources, protect the environment, save money and avoid violating the first principle (never throw anything away ). My first experience with recycled glaze ingredients was when my job was to empty a fifteen gallon trap built into the floor at the University of Michigan in 5734 (1974). This material without any alterations was an acceptable cone ten semi-matte black. If I remember correctly we called it Scrap Black. It was not very popular, it might still be there..

My next experience was while my wife was teaching at University of Missouri, Columbia. We had inherited a good deal of glaze remnants with little documentation and a five gallon trap full of glaze material. We mixed it all together and developed a few glazes with these materials. Named "Moonlight over Montana" and other colorful names these firing sensitive glazes with complexly colored and surfaces were studio favorites until they ran out.

In the Island University studio I (used to) segregate the clay washing sink from the glaze sink. This limits the variation in the scrap and insures that the glaze scrap will at least come close to melting. It also limits the amount of red clay in the scrap and keeps the scrap glaze from always being a tenmoku. It is a good idea when possible to keep glaze scrap separated by temperature. Since we fire most everything to cone 10 this is not a problem for us.

When altering the glaze scrap I try to use only inexpensive ingredients, and only those that are very O.K. to dispose of in landfills. I mix and sieve the scrap and test it in our normal firing cycle. If the scrap has chunks in it that don't want to mix in I throw the chunks away.

Runny glazes that craze get additions of clay; sometimes a ball clay, sometimes kaolin, occasionally a red clay. I use additions of about 2 pounds to five gallons. I don't bother weighing it. Glazes that craze but are not runny get silica straight up or talc and silica. I use the talc when I am short on matt glazes in the studio. Scrap that doesn't seem quite melted usually gets whiting or dolomite, or occasionally plastic vitrox.

I favor red iron oxide, and rutile as colorants to add to scrap glazes. For five gallons I use about 250 grams (1/4 pound). When the scrap glazes start to build up however, some cobalt carbonate will increase usage. If the glaze is not already too dark, cobalt carbonate 100 grams should make a big difference in five gallons of glaze. With cobalt's cost, it better make a difference. I usually  prefer to use the big dollar colorants in tested glazes.

A common fault of these scrap materials is over-floculation. This is often caused by an excess of soluble ingredients in the scrap. Over-floculation can cause crawling. To wash out the soluble salts, split the materials into a few 1/4 full buckets. Add water until full, stir and let the scrap settle out. Throw the water from the top of the buckets away. If the problem is severe, wash the materials twice.
 
Scrap materials build up fast and fixing five gallon buckets has become too much work. It seems that with good reclamation about 15 gallons of scrap glaze appear semester down here at the Island University. I am beginning this semester to fix the scrap glaze in 15 gallon quantities. We get the buckets from community swimming pools. They get pool chemicals in them. The buckets come with nice screw down plastic lids.

 
When a glaze looks especially nice, or I do a good demonstration pot with it, it gets used quickly. The students know there will be no more. When I am demonstrating glazing or onglaze decorating I often use an unpopular scrap glaze, and wash the pot off afterward, so I can use the bisqueware again.
 
Gail Busch, my wife, always washes her sigillata brushes in the same cup of distilled water. Her scrap sig usually comes out a gray blue green.. Scrap Raku glazes usually need no alteration,. and have been our most popular surfaces. If they don't look good try adding copper carbonate.

The key to recycling is to spend you efforts where they will do the most good. If a  batch of scrap just won't work, throw it away, and concentrate your efforts more productively on a batch that looks promising. If a batch looks like it will require a large alteration to make it work, throw it away. Teach your students to use a spatula to recover glazes from pouring containers and ladles. Back to the studio.....,
Changed lines 44-47 from:
=]
to:

Thanks

Louis Katz
December 27, 2015, at 09:29 PM by 76.248.208.103 -
Added lines 1-88:
[=Ask the Doctor:
Preventative Medicine
"Waste Not"
Dear Doctor,
I goofed mixing a bucket of a glaze wrong. I apparently switched recipes
mid-stride. Can you help me find a use for this runny green glop.
Sincerely,
Oops in Michigan,
***Dear Doctor,
Our glaze area sink does not have a trap, so we have been washing
brushes, buckets and other glazing tools in trash cans filled with water.
The second can is almost filled. I would hate to throw away this
material. What should I do?
Sincerely,
To the Rim in Arizona,
Dear Oops and ***Rim,
I applaud your desire to conserve resources, protect the environment,
save money and avoid violating the first principle (never throw anything
away ). My first experience with recycled glaze ingredients was when my
job was to empty a fifteen gallon trap built into the floor at the
University of Michigan in 5734 (1974). This material without any
alterations was an acceptable cone ten semi-matte black. If I remember
correctly we called it Scrap Black. It was not very popular, it might
still be there..
My next experience was while my wife was teaching at University of
Missouri, Columbia. We had inherited a good deal of glaze remnants with
little documentation and a five gallon trap full of glaze material. We
mixed it all together and developed a few glazes with these materials.
Named "Moonlight over Montana" and other colorful names these firing
sensitive glazes with complexly colored and surfaces were studio
favorites until they ran out.
In the Island University studio I segregate the clay washing sink from
the glaze sink. This limits the variation in the scrap and insures that
the glaze scrap will at least come close to melting. It also limites the
amount of red clay in the scrap and keeps the scrap glaze from always
being a tenmoku. It is a good idea when possible to keep glaze scrap
separated by temperature. Since we fire most everything to cone 10 this
is not a problem for us.
When altering the glaze scrap I try to use only inexpensive ingredients,
and only those that are O.K. to dispose of in landfills. I mix and sieve
the scrap and test it in our normal firing cycle. If the scrap has chunks
in it that don't want to mix in I throw the chunks away.
Runny glazes that craze get additions of clay; sometimes a ball clay,
sometimes kaolin, occasionally a red clay. I use additions of about 2
pounds to five gallons. I don't bother weighing it. Glazes that craze but
are not runny get silica straight up or talc and silica. I use the talc
when I am short on matt glazes in the studio. Scrap that doesn't seem
quite melted usually gets whiting or dolomite, or occasionally plastic
vitrox.
I favor red iron oxide, and rutile as colorants to add to scrap glazes.
For five gallons I use about 250 grams (1/4 pound). When the scrap glazes
start to build up however, some cobalt carbonate will increase usage. If
the glaze is not already too dark, cobalt carbonate 100 grams should make
a big difference in five gallons of glaze. With cobalt's cost, it better
make a difference. I usually  prefer to use the big dollar colorants in
tested glazes.
A common fault of these scrap materials is over-floculation. This is
often caused by an excess of soluble ingredients in the scrap.
Over-floculation can cause crawling. To wash out the soluble salts, split
the materials into a few 1/4 full buckets. Add water until full, stir and
let the scrap settle out. Throw the water from the top of the buckets
away. If the problem is severe, wash the materials twice.
***Scrap materials build up fast and fixing five gallon buckets has
become too much work. It seems that with good reclamation about 15
gallons of scrap glaze appear semester down here at the Island
University. I am beginning this semester to fix the scrap glaze in 15
gallon quantities. We get the buckets from community swimming pools. They
get pool chemicals in them. The buckets come with nice screw down plastic
lids.
***When a glaze looks especially nice, or I do a good demonstration pot
with it, it gets used quickly. The students know there will be no more.
When I am demonstrating glazing or onglaze decorating I often use an
unpopular scrap glaze, and wash the pot off afterward, so I can use the
bisqueware again.
***Gail Busch, my wife, always washes her sigillata brushes in the same
cup of distilled water. Her scrap sig usually comes out a gray blue
green.. Scrap Raku glazes usually need no alteration,. and have been our
most popular surfaces. If they don't look good try adding copper
carbonate.
The key to recycling is to spend you efforts where they will do the most
good. If a a batch of scrap just won't work, throw it away, and
concentrate your efforts more productively on a batch that looks
promising. If a batch looks like it will require a large alteration to
make it work, throw it away. Teach your students to use a spatula to
recover glazes from pouring containers and ladles.
Back to the studio.....,
Louis
=]
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Page last modified on November 19, 2018, at 08:58 AM