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wood kilns - and car pollution

updated sat 21 dec 02


Lee Love on fri 20 dec 02

----- Original Message -----
From: "Philip Poburka"

> We may recall, that Chipboard or it's kin as 'flakeboard',
> 'particle board' and so on have been understood to be bound
> with Formaldehyde related adhesives.
> The decomposition of which in combustion may be unpleasant
> for whoever should be subject to the fumes or smoke from it.

Not all glue in composite woods are formaldehyde based.

From the literature I've read, the main hazard of formaldehyde the its
venting from non-buring partical wood used in home construction. Buring it
is a way to destroy the formaldehyde. The main hazard in burning it is in
heating stoves or in open fires. The recommended way to dispose of composite
wood is in an incinerator or boiler at high temperature. If I didn't burn
this wood in a high temperature kiln, with a nice tall chimney, it would still
be burnt, but in a less favorable manner.

> Not 'clean' like honest Wood is...and allways made of
> low-caloric yielding 'softwood' flakes and chips with lots
> of Formaldehyde 'glue'...

Honest wood? *haha!* Like one of our Presidents said,
"Cut down a tree because they cause pollution?" That's better than burning
what would be burnt anyways?

Euan has told me from his research, that the binding elements of the
wood have about the same energy as the wood parts.

Here in Mashiko, usually 'softwood' is used in the woodfired
kilns, red pine being favored. Sometimes heavier wood is used for different
ash effects.

The ash from the particle board is more abundant than from red pine
in this kiln because it is a "fast fire" design which depends on a high volume
of air passing under the fire grates. The chips fall apart quickly and turn
immediately into ash. It shares this quality with sawdust, except the surface
size of the wood is larger and is more easily moved by the draft.

I may partially fire with kerosene (finish the firing), to reduce
the amount of ash on the pots. My glaze tests put in Euan's last firing were
place in the back, where the flame enters, and they all had too much ash, after
a 12 hour firing.

> Not so good maybe...for one's Neighbors...

That's a big laugh! I don't live in Las Vegas. I lack immediate
"neon pollution", but am surrounded by farmers. They do much burning in the
fall and spring. They burn grass instead of cutting it. The burning of the
Nuka (rice husks) puts out an especially strong smoke. Reminds me of my
childhood when everybody burned their yard leaves. Sometimes the smoke is so
thick you have to drive with your lights on during the daytime. We often have
to close the house up at these times.

If you are "sincerely" interested in not putting formaldehyde into the
environment, you wouldn't drive a car would you? ;^) Read below:

A short list of the likely pathogens in car exhaust:

Carbon monoxide
Nitrogen dioxide
Nitrogen monoxide
Sulphur dioxide
Suspended particles including PM-10, particles less than 10 microns in size.
Polycyclic hydrocarbons

Lee in Mashiko, Japan
| Lee Love ^/(o\| Practice before theory. |
| |\o)/v - Sotetsu Yanagi - |