Megan Ratchford on mon 21 jan 02
Hey all, Just a quick reminder, this also applies to anything we'd call a
slip. A month or so back I asked for help in finding a cone 10 "slip"
recipe for this nasty stuff. Not a notice of warning from the list, though
I happen to know what a nasty substance it is. But some may not. This is a
good thread. We should all be aware of what we're dealing with in the
studio, beginners and pros alike!
Also, just so anyone doesn't go to bed with the major guilt monsters,
the archives already have a bunch of recipes for cone 6. Plenty of fodder
for disaster already posted. ;)
Megan
----- Original Message -----
From: "Dannon Rhudy"
To:
Sent: Monday, January 21, 2002 5:45 AM
Subject: a long rant!../worthwhile
> Jonathan said:
>
> ...... This glaze
> >>> should be never used. Just look at the percentage of manganese dioxide
and
> >>> copper carb
> >The red flag went up immediately when I saw 64% Manganese Dioxide and 14%
> >Copper Carbonate. Certainly ...
> This is just plain stupid.
> .... fumes from these materials should not be inhaled. Dave Shaner's
> >experience ..... from MnO2 poisoning should be enough
> >reason. . Do we have to be smacked in
> >the face with baseball bat to get the picture?......
> ........ everyone on this list should
> >get a copy of John Hesselberth's and Ron Roy's new 'Mastering Cone 6
Glazes"
> >as well as Michael Bailey's "Glazes Cone 6." ......
>
> Now THIS is a rant worth reading. Jonathan is quite correct in
> noting that posting highly toxic glaze formulae is of concern. Most
> often when such unbalanced and/or toxic glazes are posted to
> the list some or many people catch it, and respond with warnings
> and cautions. However, many don't bother to read cautions, many
> don't pay attention if they DO read them, or take them lightly.
> Also, such postings are automatically archived - anyone might
> find them and try them out. This probably can't be helped. But
> it behooves us, and ESPECIALLY those who don't understand much
> about glazes, to think about what they are slathering on a pot,
> to think about how the glaze might or might not function, and to
> THINK ABOUT WHAT THEY ARE BREATHING while that pot/glaze
> is being fired.
>
> Learn some basics about what your glazes are made of, what
> kinds of things are likely to be stable in what kind of glaze, fired
> to what temperature. If you can't do that, or don't want to do that,
> at the VERY LEAST get a copy of a current glaze book such as
> Ron & John's, and stick with things that have been tested by someone
> who knows what they are about. There are earlier glaze books,
> too, some of which are quite good. But we know a lot more about
> testing than we used to, and leaching, and toxic fumes from firing.
> So current books are going to be more useful in some ways.
>
> One of the most efficient ways to get toxins into
> the body is to breathe them in. Think about that, folks.
> Use good ventilation. Keep the really nasty stuff out of the
> kiln altogether. And if you don't know what the nasty stuff
> IS, find out.
>
> regards
>
> Dannon Rhudy
>
>
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