Alisa and Claus Clausen on sun 23 apr 00
------------------
Dear Ron and Clayart
I have the results of my latest test tiles from my (bloats galore) glaze =
firing.
Mareks tranpsarent recipe (March 10)
Potash Feldspar 40
flint (quartz) 25
Whiting 20
China clay 12,5
Transparent as above
Result was a
transparent silkmat where normal to thin
milky or underfired in double dipped application
1=25 iron same surface as above, dark honey brown
1=25 colbalt ditto traces of=
blue
1=25 black copper ditto brownish
In general, unattractive surface and colorings.
Mareks once fire transparent
Potash feldspar 38
Flint (quartz) 20
Whiting (chalk) 32
Ball clay 10
Produced a brilliant shiny tranparent, however large crackling over bend of =
test
tile.
Crackling where dipped twice.
>From these tests, I would unfortunately not use these glazes.
Is it possible Ron, for you to rework the first glaze to make it a cone 6 =
glaze?
I was interested in this receipe because the materials are all very =
available to
me. No fritts that I would need to find equiv. for.
What do you think?
Otherwise I have a lot of raw materials so any recipes would be welcomed for
testing.
Alisa in Denmark
PS Blue hare fur
I remixed the original receipe I got from Lori, Badlandspottery
Neph Sye 47,3
Gerstley Borate 27,0
Flint/silica 20,3
EPK 5,4
Red iron ox. 2,0
Colbalt 1,0
Rutile 20,3
EPK 5,4
remixed with a suggestion of
Red iron ox. 1,0
Colbalt ox. 2,0
Much more floating blue, but predominately brown. Not green however which I
also think was an
improvement.
I think this could be a glaze for the inside of some of my decorative bowls,
hoping for a good blue puddle in the middle. But not the kind of staple =
glazes
I am looking for,
especially for coloring.
-----Oprindelig meddelelse-----
Fra: Ron Roy =3Cronroy=40pop.total.net=3E
Til: CLAYART=40LSV.UKY.EDU =3CCLAYART=40LSV.UKY.EDU=3E
Dato: 17. april 2000 22:53
Emne: Re: Sv: Re: Sv: Re: food safety/oxides
----------------------------Original message----------------------------
Hi Alisa,
I am sure it is not a cone 6 glaze - it has no bron for starters - and noit
enough secondary fluxes - and too much alumina and silica - I compared it
with other cone 6 glazes - it will not melt at cone 6.
The Hamers are British if that helps.
Do share some of your results with me - I learn by working with others - I
do the reforms and they do the firing - a good exchange and I get better at
it.
RR
=3E----------------------------Original message----------------------------
=3E------------------
=3ERon,
=3EI am really grateful for your time to answer my questions. As I recently=
said
=3Eto Tom B. I was a bit ashamed of myself asking so many detailed ones,
=3Eas if I had a private mentor. But your answers are most, most helpful.
=3EI will be asking Marek soon about Marekk's cone 6 clear, because I have
=3Enot had rave success with it. Could be like you say, it is not cone 6
=3E(Marek??)
=3E
=3EI plan a visit to the states in the next two or three months, so I will =
buy
=3Emyself
=3Ethe Hammer book. Actually, Steven B. could send it much faster.
=3E
=3EAs I also said to Tom B. that now that I seemingly have as many test =
tiles in
=3Eevery
=3Ekiln as ware, my questions become bountiful. But more tests, lead to =
more
=3Equestions,
=3Eanswered also by.........more tests=21 and the great help of people like
=3Eyourself.
=3E
=3EThank you very, very much Ron. I have beautiful rainbows of test tiles
=3Ein all nuances of varying strengths of oxides. This is very exciting =
work.
=3EI am learning and doing and learning and crying and learning and happy =
again.
=3E
=3EI am going to see the very exciting =22Riverdance=22 tonight
=3Eand I will try not to think about glazes.
=3E
=3EBest regards,
=3EAlisa in Denmark
=3EWhere the winter's promise of Spring has been honored.
Ron Roy
93 Pegasus Trail
Scarborough
Ontario, Canada
M1G 3N8
Evenings 416-439-2621
Fax 416-438-7849
Ron Roy on tue 2 may 00
Alisa,
Hi - see I'm only a week behind - I sometimes imagine I am sending replies
to people who are no longer there.
Did you get the right info on bloating.
1. Air bubbles in vitrified clay some times look like bloating.
2. Big bubbles from unclean bisque - black coring - looks like bloating but
it's from FeO over fluxed clay body.
3. Small bubbles or raised spots over all the body means the clay is over
fluxed at the temperature it was fired at.
Most potters use the same word for all the above but they are all different
and require different fixes.
I can make either glaze fire properly at cone 6 - with some testing - but
for them to work well with all colours I suggest using some boron. I
usually recommend Frit 3134 - if you have an equivalent then I need the
analysis for it.
Thats your job - you send that and the recipe you want to work with and I
will do my part.
RR
>----------------------------Original message----------------------------
>------------------
>Dear Ron and Clayart
>
>I have the results of my latest test tiles from my (bloats galore) glaze
>firing.
>
>Mareks tranpsarent recipe (March 10)
>
>Potash Feldspar 40
>flint (quartz) 25
>Whiting 20
>China clay 12,5
>
>Transparent as above
>
>Result was a
>transparent silkmat where normal to thin
>milky or underfired in double dipped application
>
>1% iron same surface as above, dark honey brown
>1% colbalt ditto traces of blue
>1% black copper ditto brownish
>
>In general, unattractive surface and colorings.
>
>Mareks once fire transparent
>Potash feldspar 38
>Flint (quartz) 20
>Whiting (chalk) 32
>Ball clay 10
>
>Produced a brilliant shiny tranparent, however large crackling over bend
>of test
>tile.
>Crackling where dipped twice.
>
>From these tests, I would unfortunately not use these glazes.
>
>Is it possible Ron, for you to rework the first glaze to make it a cone 6
>glaze?
>I was interested in this receipe because the materials are all very
>available to
>me. No fritts that I would need to find equiv. for.
>
>What do you think?
>Otherwise I have a lot of raw materials so any recipes would be welcomed for
>testing.
>
>Alisa in Denmark
>
>PS Blue hare fur
>
>I remixed the original receipe I got from Lori, Badlandspottery
>Neph Sye 47,3
>Gerstley Borate 27,0
>Flint/silica 20,3
>EPK 5,4
>
>Red iron ox. 2,0
>Colbalt 1,0
>Rutile 20,3
>EPK 5,4
>
>remixed with a suggestion of
>Red iron ox. 1,0
>Colbalt ox. 2,0
>
>Much more floating blue, but predominately brown. Not green however which I
>also think was an
>improvement.
>I think this could be a glaze for the inside of some of my decorative bowls,
>hoping for a good blue puddle in the middle. But not the kind of staple glazes
>I am looking for,
>especially for coloring.
>
>
>
>
>
>
>
>
>-----Oprindelig meddelelse-----
>Fra: Ron Roy
>Til: CLAYART@LSV.UKY.EDU
>Dato: 17. april 2000 22:53
>Emne: Re: Sv: Re: Sv: Re: food safety/oxides
>
>
>----------------------------Original message----------------------------
>Hi Alisa,
>
>I am sure it is not a cone 6 glaze - it has no bron for starters - and noit
>enough secondary fluxes - and too much alumina and silica - I compared it
>with other cone 6 glazes - it will not melt at cone 6.
>
>The Hamers are British if that helps.
>
>Do share some of your results with me - I learn by working with others - I
>do the reforms and they do the firing - a good exchange and I get better at
>it.
>
>RR
>
>>----------------------------Original message----------------------------
>>------------------
>>Ron,
>>I am really grateful for your time to answer my questions. As I recently said
>>to Tom B. I was a bit ashamed of myself asking so many detailed ones,
>>as if I had a private mentor. But your answers are most, most helpful.
>>I will be asking Marek soon about Marekk's cone 6 clear, because I have
>>not had rave success with it. Could be like you say, it is not cone 6
>>(Marek??)
>>
>>I plan a visit to the states in the next two or three months, so I will buy
>>myself
>>the Hammer book. Actually, Steven B. could send it much faster.
>>
>>As I also said to Tom B. that now that I seemingly have as many test tiles in
>>every
>>kiln as ware, my questions become bountiful. But more tests, lead to more
>>questions,
>>answered also by.........more tests! and the great help of people like
>>yourself.
>>
>>Thank you very, very much Ron. I have beautiful rainbows of test tiles
>>in all nuances of varying strengths of oxides. This is very exciting work.
>>I am learning and doing and learning and crying and learning and happy again.
>>
>>I am going to see the very exciting "Riverdance" tonight
>>and I will try not to think about glazes.
>>
>>Best regards,
>>Alisa in Denmark
>>Where the winter's promise of Spring has been honored.
>
>Ron Roy
>93 Pegasus Trail
>Scarborough
>Ontario, Canada
>M1G 3N8
>Evenings 416-439-2621
>Fax 416-438-7849
Ron Roy
93 Pegasus Trail
Scarborough
Ontario, Canada
M1G 3N8
Evenings 416-439-2621
Fax 416-438-7849
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