Louis H.. Katz on thu 16 dec 99
Hi Dave Finkelnburg
Like always much of my reading happend long ago. I believe that at least some
of the zinc oxide that we get comes from condensed gases from lead smelting
processes. I could easily be wrong.
Louis
Dave Finkelnburg wrote:
> ----------------------------Original message----------------------------
> Hi all!
> Monona's original concern was about certain sleazy vendors (with EPA
> approval!) taking hazardous waste from industry, like steel mill fly ash,
> and selling it as a source of some plant nutrient like zinc. Trouble was,
> the
> fly ash not only contained zinc, but also lead and other nasty heavy metals
> in very significant quantities. Does
> anyone know where the zinc sold to potters comes from? What else is in
> there besides the
> zinc? Are we getting more than we think we are buying??? Same question
> about
> certain other metals like iron oxide. If it's only 50% iron in some cases,
> what else is in there?
> I had never thought about this until reading Monona's excellent post.
> Dave Finkelnburg
>
> -----Original Message-----
> From: ACTSNYC@cs.com
> To: CLAYART@LSV.UKY.EDU
> Date: Monday, December 13, 1999 3:59 PM
> Subject: Re: Smells!
>
> >----------------------------Original message----------------------------
> >
> >>
> >> ababy sharon wrote:
> >> >
> >> > ----------------------------Original
> message----------------------------
> >> > Sometimes ago, I read in Claytimes about using fertilizers as glazing
> >> > materials. Or somewhere else about adding Cows manure to Saggar
> firing,.
> >> > Real stink! But for someone like me, who lives in an agriculture
> >community
> >> > it sound great, what worries me is the "L.O.I". and where does it go,
> to
> >> the
> >> > elements, to my body or is it just smells?
> >
> >I rebutted the suggestion to use fertilizer in my own column in Clay Times
> >with information from an investigative reporter in Seattle. He found that
> >the laws in this country allowed industrial fly ash and other industrial
> >waste as fertilizer. The analyses on the bags only listed the nutrients
> such
> >as phosphorus, nitrogen, etc. The manufacturers were not telling people
> that
> >the fertilizers also contained arsenic, lead, dioxins, cadmium, and other
> >toxic substances.
> >
> >The problem was so bad that our fertilizers were banned in most foreign
> >countries including Canada, but we, the public, didn't even know about it.
> >
> >As a result of this reporters articles, there are changes occurring in the
> >fertilizer business. But I still wouldn't use them for ceramics until much
> >more is known about the complete analyses of the products.
> >
> >Monona
> >
> >ACTS
> >181 Thompson St., # 23
> >NYC NY 10012-2596 212/777-0062
> >
> >ACTSNYC@cs.com
> >
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