Mark Tigges on thu 2 feb 06
On Thu, Feb 02, 2006 at 06:24:26AM -0800, Karen Sullivan wrote:
> Get ahold of the Studio Potter article About David Shaner and his
> health problems With manganese... It was a few years ago...I am
> sorry, but I don't remember the date. It is an important article
> about Material safety....and the sad Results of not being aware.
Thanks I will.
> Dust from the material and Mostly the vapors from the kiln... Are
> the problem. The most direct route of Ingestion of the material is
> From breathing the vapors, especially while firing. Tramping on the
> dust of the material on The floor and breathing in the dust is also
> a pathway to the lungs.
I actually started building a kiln vent yesterday. My kiln is in the
same area as my wheel, but I don't work when I'm in there. Only to
check the cones. I've been taking step by step pics of my kiln vent
so I think I'll write an html page about building it. I always wear a
good mask when mixing dry material.
> Cleaning work surfaces with a wet towel... Not sweeping and kicking
> the dust into the air.
This is the tough one. If I spill glaze, I wipe it up right away, but
wiping down my floor area is kind of hard, I have to organize things
differently so I can do that.
> Once the material is fired then safety Is a function of how dense
> and hard the Glass of the glaze is that contains The metal...the
> higher the temp of the Glaze the more durable the glass. Some
> materials like copper leach Through most glazes, as copper tends To
> be unstable..... So you can do a simple test with an Acid....lemon
> juice or vinegar.... An amount sitting in the cup...for A
> day...then wash out the cup and check the Glaze and see if the
> surface has degraded.... A good indicator that the glaze is
> Unstable and leaching metals.
This I all know, I'm using the food safe glazes from MC6G, so I'm
pretty confident in them. I don't use the stain on the inside of any
pieces.
Thanks,
Mark.
Karen Sullivan on thu 2 feb 06
Mark....
Get ahold of the Studio Potter article
About David Shaner and his health problems
With manganese...
It was a few years ago...I am sorry, but
I don't remember the date.
It is an important article about
Material safety....and the sad
Results of not being aware.
Dust from the material and
Mostly the vapors from the kiln...
Are the problem.
The most direct route of
Ingestion of the material is
From breathing the vapors,
especially while firing.
Tramping on the dust of the material on
The floor and breathing in the dust
is also a pathway to the lungs.
I would suggest some venting system for
The kiln...so it clears the air....
Especially if the kiln is inside a room.
Perhaps a fan to blow the air outside
Would help and be a start.
Cleaning work surfaces with a wet towel...
Not sweeping and kicking the dust into the air.
Once the material is fired then safety
Is a function of how dense and hard the
Glass of the glaze is that contains
The metal...the higher the temp of the
Glaze the more durable the glass.
Some materials like copper leach
Through most glazes, as copper tends
To be unstable.....
So you can do a simple test with an
Acid....lemon juice or vinegar....
An amount sitting in the cup...for
A day...then wash out the cup and check the
Glaze and see if the surface has degraded....
A good indicator that the glaze is
Unstable and leaching metals.
Hope this helps....
karen
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