piedpotterhamelin@COMCAST.NET on sun 31 oct 04
Hi Kate
I am dipper and pourer. I mix up my slip in 10-20 gallon quantities. Brushing is too time consuming for me.
The terms we use are not at times applicable for the other arts and certainly are confusing. This said, a stain (more apt "colorant) can be severly affected by other metals that are used in a glaze. Mason in the past published a chart as to what chemicals improved or compromised the color or tint of a "stain", more accurately, colorant. While I believe that Mason colorants could be paint colorants in their own right, they are fritted or fused combinations of glassy frits, fluxes, oxides and carbonates. The latter two could "stain" a surface if rubbed onto it, as do raw cobalt or manganese are prone to do, but in practice, potters and ceramicists tend to mix these mason colors with frits and clays to get them to stick onto the clay (as a clay surface treatment or an underglaze engobe or slip) or into the glaze (as a fusible overglaze brushwork) or onto the glaze as an enamel overglaze. Not to mention as being a glaze colorant. The composition of the Mason stain generally demands tha
t it has a flux added to it as it relates to temp. Being that some Mason yellow stains contain the opacifiers tin or zirconium in combination with praesymodium (gimme a break here, this is from memory)
the likelihood that it would opacify is great, denying you transparency. I believe the other yellow colorants are like this.
Zamek's success as shown in the book is certainly the most direct line for you at this time as you experiment in other ways.
Take care and good luck
Rick
Kate Johnson on sun 31 oct 04
Hi again, Rick!
> I am dipper and pourer. I mix up my slip in 10-20 gallon quantities.
> Brushing is too time consuming for me.
It would be, for a professional, yes! I think once I figure out what works
to get the effect I want, I'll be going that way too...
> The terms we use are not at times applicable for the other arts and
> certainly are confusing. This said, a stain (more apt "colorant) can be
> severly affected by other metals that are used in a glaze. Mason in the
> past published a chart as to what chemicals improved or compromised the
> color or tint of a "stain", more accurately, colorant.
You know, it JUST now clicked with me that Mason is a COMPANY making stains.
I thought, being the daughter of a bricklayer, it was that other kind of
mason. Sheesh. Will try to chase down both company and chart! (Anyone
have an idea where I could find such a thing?)
> While I believe that Mason colorants could be paint colorants in their own
> right, they are fritted or fused combinations of glassy frits, fluxes,
> oxides and carbonates. The latter two could "stain" a surface if rubbed
> onto it, as do raw cobalt or manganese are prone to do, but in practice,
> potters and ceramicists tend to mix these mason colors with frits and
> clays to get them to stick onto the clay
I mixed some perhaps too lightly with borax...it stuck better than just
Mason stain and water, but still much of it powdered off. If one were to
put a clear glaze over that without washing off the excess powder, I could
see problems ahead, yes? Seems to me as if the glaze wouldn't stick...?
(as a clay surface treatment or an underglaze engobe or slip) or into the
glaze (as a fusible overglaze brushwork) or onto the glaze as an enamel
overglaze. Not to mention as being a glaze colorant. The composition of the
Mason stain generally demands that it has a flux added to it as it relates
to temp. Being that some Mason yellow stains contain the opacifiers tin or
zirconium in combination with praesymodium (gimme a break here, this is from
memory)
Absolutely.
> the likelihood that it would opacify is great, denying you transparency. I
> believe the other yellow colorants are like this.
> Zamek's success as shown in the book is certainly the most direct line for
> you at this time as you experiment in other ways.
I can't wait to get it...as I said, it's on the way!
Best--
Kate
Earl Brunner on sun 31 oct 04
http://www.masoncolor.com/
Here's the actual company website, but almost all of the ceramic supply
companies will carry the charts and stains.
Earl Brunner
Las Vegas, NV
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Kate Johnson
Sent: Sunday, October 31, 2004 7:44 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: redware and A mason stain question
You know, it JUST now clicked with me that Mason is a COMPANY making stains.
I thought, being the daughter of a bricklayer, it was that other kind of
mason. Sheesh. Will try to chase down both company and chart! (Anyone
have an idea where I could find such a thing?)
Kate Johnson on sun 31 oct 04
Thank you, Earl...I was going to Google Mason later, you saved me the
search!
> http://www.masoncolor.com/
> Here's the actual company website, but almost all of the ceramic supply
> companies will carry the charts and stains.
This will be interesting to test...several of those yellows look very good,
for tinting slip. I imagine I'll try it both ways...
Best--
Kate
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