Birgit Wright on fri 15 apr 11
Hello Claybuds=3D3B Finally we have our internet service back after being =
ou=3D
t for a week. I have a question about red slip on plates and bowls under c=
=3D
lear glaze. It is 20 grams red mason stain to 100 grams dry clay from my wh=
=3D
ite cone six stoneware plus a lot of water=3D2C it is lightly washed over a=
t=3D
extured area and then wiped off the surface and covered with MC6 transparen=
=3D
t liner glaze. I did do a test tile and put it beside work done with the s=
=3D
ame technique but in black and white. http://birgitspots.blogspot.com/. =
=3D20
=3D20
What=3D2C if any=3D2C are the problems with this if it is covered with gla=
ze? =3D
How should I test it besides the vinegar and dishwasher test.
=3D20
I will appreciate any advice. thanks=3D2C Birgit Wright =
=3D
Birgit Wright on fri 15 apr 11
Hi Ron=3D3B Thanks for your reply. It is mason stain K-5987=3D2C Red. It=
say=3D
s on the label that it is cadmium and that "For use on Food Surfaces only i=
=3D
f testing establishes that leachable cadmium is below legal limits"=3D2C S=
o=3D
=3D2C I guess I should have been wearing my glasses for the fine print. We=
ll=3D
=3D2C I suppose I will need to know what kind of testing that involves and =
wh=3D
ether it is affordably worth while. I have tried and will try harder to ke=
=3D
ep the design element to the side or edge=3D2C I can even minimize it some=
wh=3D
at but keeping it inside the plates and bowls is kind of important to me. I=
=3D
sure hope this is do-able. =3D20
=3D20
If you can let me know where I can get it done I would appreciate it. I am=
=3D
in Ontario=3D2C near Owen Sound=3D2C is there anywhere nearby?
Thanks again=3D2C Birgit=3D20
=3D20
> Date: Fri=3D2C 15 Apr 2011 13:31:21 -0400
> From: ronroy@ca.inter.net
> To: awlwright50@HOTMAIL.COM
> CC: Clayart@LSV.CERAMICS.ORG
> Subject: Re: Red stained slip under MC6 clear glaze?
>=3D20
> Hi Birgit=3D2C
>=3D20
> What is in the red stain - if cadmium or lead you will need to have it te=
=3D
sted.
>=3D20
> The glaze is very stable but if there are toxics present you need to=3D20
> make sure you are getting good coverage.
>=3D20
> RR
>=3D20
>=3D20
> Quoting Birgit Wright :
>=3D20
> > Hello Claybuds=3D3B Finally we have our internet service back after=3D2=
0
> > being out for a week. I have a question about red slip on plates=3D20
> > and bowls under clear glaze. It is 20 grams red mason stain to 100=3D20
> > grams dry clay from my white cone six stoneware plus a lot of water=3D2=
C=3D
=3D20
> > it is lightly washed over a textured area and then wiped off the=3D20
> > surface and covered with MC6 transparent liner glaze. I did do a=3D20
> > test tile and put it beside work done with the same technique but in=3D=
20
> > black and white. http://birgitspots.blogspot.com/.
> >
> > What=3D2C if any=3D2C are the problems with this if it is covered with=
=3D20
> > glaze? How should I test it besides the vinegar and dishwasher test.
> >
> > I will appreciate any advice. thanks=3D2C Birgit Wright
>=3D20
>=3D20
>=3D20
=3D
Ron Roy on fri 15 apr 11
Hi Birgit,
What is in the red stain - if cadmium or lead you will need to have it test=
ed.
The glaze is very stable but if there are toxics present you need to
make sure you are getting good coverage.
RR
Quoting Birgit Wright :
> Hello Claybuds; Finally we have our internet service back after
> being out for a week. I have a question about red slip on plates
> and bowls under clear glaze. It is 20 grams red mason stain to 100
> grams dry clay from my white cone six stoneware plus a lot of water,
> it is lightly washed over a textured area and then wiped off the
> surface and covered with MC6 transparent liner glaze. I did do a
> test tile and put it beside work done with the same technique but in
> black and white. http://birgitspots.blogspot.com/.
>
> What, if any, are the problems with this if it is covered with
> glaze? How should I test it besides the vinegar and dishwasher test.
>
> I will appreciate any advice. thanks, Birgit Wright
Ron Roy on sat 16 apr 11
Hi Birgit,
Lead is not the way to red - cadmium gives the red colour and it is
the problem - there must be stains that are made with encapsulated
cadmium but you will still need to have some testing done.
Fist step is call your supplier and see which red stains are made with
encapsulated cadmium.
There are other ways to get pinks and reds by the way - does anyone
use chrome tin combinations in the way Birgit decorates.
Birgit - post the url to those pictures again.
Canadian Department of Health, hazardous Products (Ceramics and
Glassware) regulations if you want to find the regulations for lead
and cadmium.
http://laws.justice.gc.ca/en/H-3/SOR-98-176/130617.html
Perhaps you can find a way to use our raspberry glaze - working some
into the texture and a clear version over?
RR
Quoting Birgit Wright :
>
> Hi Ron; I Don't know that I need to use the cadmium red if lead is
> better or safer under the glaze. Is there a lead based stain out
> there, a mason stain or the newer Chinese ones at PSH. I have had a
> lot of requests for red so I am looking into it, I know I need to
> learn a lot and I am ready to do that, as best I can. Could I
> please just ask how to frame the question of where to look for
> regulations, Which government agency do I ask?
> Thanks again, Birgit
Birgit Wright on sat 16 apr 11
Hi Ron=3D3B I Don't know that I need to use the cadmium red if lead is bet=
te=3D
r or safer under the glaze. Is there a lead based stain out there=3D2C a m=
as=3D
on stain or the newer Chinese ones at PSH. I have had a lot of requests fo=
=3D
r red so I am looking into it=3D2C I know I need to learn a lot and I am re=
ad=3D
y to do that=3D2C as best I can. Could I please just ask how to frame the =
qu=3D
estion of where to look for regulations=3D2C Which government agency do I a=
sk=3D
?
Thanks again=3D2C Birgit
=3D20
> Date: Sat=3D2C 16 Apr 2011 15:54:45 -0400
> From: ronroy@ca.inter.net
> To: awlwright50@hotmail.com
> CC: clayart@lsv.ceramics.org
> Subject: RE: Red stained slip under MC6 clear glaze?
>=3D20
> Hi Bridgit=3D2C
>=3D20
> First down load the regulations - you should be able to call a local=3D20
> government office and find out where.
>=3D20
> There will be a lab somewhere not too far away that can do the testing=3D=
20
> - whoever does the water testing for Owen Sound should be able to do it.
>=3D20
> There is a lab in Peterborough that I use from time to time but they=3D20
> require 3 sets of analysis each time so the cost is over $100.
>=3D20
> If the readings are very low you might not have to have every pot=3D20
> tested - you are the one who has to get it right however so the=3D20
> covering glaze is important - I would think crazing would not be=3D20
> acceptable.
>=3D20
> Are you sure you want to work with Cadmium? It's 10 times more toxic=3D20
> than lead.
>=3D20
> RR
>=3D20
>=3D20
> Quoting Birgit Wright :
>=3D20
> >
> > Hi Ron=3D3B Thanks for your reply. It is mason stain K-5987=3D2C Red. I=
t=3D20
> > says on the label that it is cadmium and that "For use on Food=3D20
> > Surfaces only if testing establishes that leachable cadmium is below=3D=
20
> > legal limits"=3D2C So=3D2C I guess I should have been wearing my glasse=
s=3D20
> > for the fine print. Well=3D2C I suppose I will need to know what kind=
=3D20
> > of testing that involves and whether it is affordably worth while.=3D20
> > I have tried and will try harder to keep the design element to the=3D20
> > side or edge=3D2C I can even minimize it somewhat but keeping it inside=
=3D20
> > the plates and bowls is kind of important to me. I sure hope this is=3D=
20
> > do-able.
> >
> > If you can let me know where I can get it done I would appreciate=3D20
> > it. I am in Ontario=3D2C near Owen Sound=3D2C is there anywhere nearby?
> > Thanks again=3D2C Birgit
> >
> >> Date: Fri=3D2C 15 Apr 2011 13:31:21 -0400
> >> From: ronroy@ca.inter.net
> >> To: awlwright50@HOTMAIL.COM
> >> CC: Clayart@LSV.CERAMICS.ORG
> >> Subject: Re: Red stained slip under MC6 clear glaze?
> >>
> >> Hi Birgit=3D2C
> >>
> >> What is in the red stain - if cadmium or lead you will need to have=3D=
20
> >> it tested.
> >>
> >> The glaze is very stable but if there are toxics present you need to
> >> make sure you are getting good coverage.
> >>
> >> RR
> >>
> >>
> >> Quoting Birgit Wright :
> >>
> >> > Hello Claybuds=3D3B Finally we have our internet service back after
> >> > being out for a week. I have a question about red slip on plates
> >> > and bowls under clear glaze. It is 20 grams red mason stain to 100
> >> > grams dry clay from my white cone six stoneware plus a lot of water=
=3D
=3D2C
> >> > it is lightly washed over a textured area and then wiped off the
> >> > surface and covered with MC6 transparent liner glaze. I did do a
> >> > test tile and put it beside work done with the same technique but in
> >> > black and white. http://birgitspots.blogspot.com/.
> >> >
> >> > What=3D2C if any=3D2C are the problems with this if it is covered wi=
th
> >> > glaze? How should I test it besides the vinegar and dishwasher test.
> >> >
> >> > I will appreciate any advice. thanks=3D2C Birgit Wright
> >>
> >>
> >>
> >
>=3D20
>=3D20
>=3D20
=3D
Ron Roy on sat 16 apr 11
Hi Bridgit,
First down load the regulations - you should be able to call a local
government office and find out where.
There will be a lab somewhere not too far away that can do the testing
- whoever does the water testing for Owen Sound should be able to do it.
There is a lab in Peterborough that I use from time to time but they
require 3 sets of analysis each time so the cost is over $100.
If the readings are very low you might not have to have every pot
tested - you are the one who has to get it right however so the
covering glaze is important - I would think crazing would not be
acceptable.
Are you sure you want to work with Cadmium? It's 10 times more toxic
than lead.
RR
Quoting Birgit Wright :
>
> Hi Ron; Thanks for your reply. It is mason stain K-5987, Red. It
> says on the label that it is cadmium and that "For use on Food
> Surfaces only if testing establishes that leachable cadmium is below
> legal limits", So, I guess I should have been wearing my glasses
> for the fine print. Well, I suppose I will need to know what kind
> of testing that involves and whether it is affordably worth while.
> I have tried and will try harder to keep the design element to the
> side or edge, I can even minimize it somewhat but keeping it inside
> the plates and bowls is kind of important to me. I sure hope this is
> do-able.
>
> If you can let me know where I can get it done I would appreciate
> it. I am in Ontario, near Owen Sound, is there anywhere nearby?
> Thanks again, Birgit
>
>> Date: Fri, 15 Apr 2011 13:31:21 -0400
>> From: ronroy@ca.inter.net
>> To: awlwright50@HOTMAIL.COM
>> CC: Clayart@LSV.CERAMICS.ORG
>> Subject: Re: Red stained slip under MC6 clear glaze?
>>
>> Hi Birgit,
>>
>> What is in the red stain - if cadmium or lead you will need to have
>> it tested.
>>
>> The glaze is very stable but if there are toxics present you need to
>> make sure you are getting good coverage.
>>
>> RR
>>
>>
>> Quoting Birgit Wright :
>>
>> > Hello Claybuds; Finally we have our internet service back after
>> > being out for a week. I have a question about red slip on plates
>> > and bowls under clear glaze. It is 20 grams red mason stain to 100
>> > grams dry clay from my white cone six stoneware plus a lot of water,
>> > it is lightly washed over a textured area and then wiped off the
>> > surface and covered with MC6 transparent liner glaze. I did do a
>> > test tile and put it beside work done with the same technique but in
>> > black and white. http://birgitspots.blogspot.com/.
>> >
>> > What, if any, are the problems with this if it is covered with
>> > glaze? How should I test it besides the vinegar and dishwasher test.
>> >
>> > I will appreciate any advice. thanks, Birgit Wright
>>
>>
>>
>
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