Ronan ORourke on wed 17 nov 99
-----Original Message-----
From: Martin Howard
To: CLAYART@LSV.UKY.EDU
Date: 10 November 1999 17:07
Subject: Re: Ash washing & Jeff Campana's posting --
>----------------------------Original message----------------------------
>Ronan wrote:-
>I will try to source some Andesite or Basalt. If I am unable to get
>hold of these might it be worth trying a feldspar / ash/ red clay triaxal?
>
>Why not have a word with your local monumental mason. Much of what comes
>from the diamond saw is andesite, basalt and similar, even though it might
>be called marble. And it should be free, if you get down there and clear
out
>the collecting tray or sump. Lovely stuff.
>
>Martin Howard
>Webbs Cottage Pottery
>Woolpits Road
>Great Saling
>BRAINTREE
>Essex CM7 5DZ
>martin@webbscottage.co.uk
>
Good idea,
as it happens I managed to find a tub of basalt in one of the darker
corners of the college glaze room, but will remember this tip for future
reference.
I seem to remember this from the 'materials for free' thread. On which
subject I have something to add. I was speaking today to a man from
Cromartie Kilns, apparently they have large amounts of HTI dust collected in
hoppers by their extraction system. The lids of drum kilns are cut roughly
to shape and then ground down their final shape. He was more than willing to
let me take it away.
So what uses can you think of for this? How about castable refractory,
grog, glaze ingredient, placing ware in the kiln.
There must be more.
Ronan
Stephen Mills on wed 24 nov 99
With respect:
HTI or HT1 bricks were a hard white fire brick made originally some
years ago by Gibbons Askam in the UK, not to be confused with K23 etc.
which are a lighter and much softer insulating brick manufactured in the
USA.
My first Kiln was built with HTI's in the early '60s, so when I got it
in '67 it had already seen some hard labour. It put another 14 or so
years under its belt before it gave way to Board and Fibre.
Steve
Bath
UK
In message , Ronan ORourke writes
>----------------------------Original message----------------------------
>Hi Martin,
>
> sorry to be be so long replying.
>
> I have just got back after firing my kiln on Friday. Unpacked this
>morning, won't be able to give a verdict until I have spent some time with
>the work, some interesting glaze tests though.
>
> Nearly 300 messages to wade through !
>
> HTI is short for high temperature insulation bricks, AKA soft
>firebricks, insulating firebrick (IFB), K22-23 etc.
>
> So what is that stuff ? Mainly silica and alumina and not a lot else
>would be my guess.
>
> Ronan
>-----Original Message-----
>From: Martin Howard
>To: CLAYART@LSV.UKY.EDU
>Date: 18 November 1999 16:24
>Subject: Re: finding basalt /was Ash washing & Jeff Campana's posting --
>
>
>>----------------------------Original message----------------------------
>>Ronan, what is HTI dust. It's not an acronym I know, but I am getting a
>copy
>>of Hamer's Encyclopedia for my 60th birthday tomorrow, so the morning will
>>possibly bring an answer.
>>
>>Really, though, anything of a stone/clay/mineral origin and a dust nature
>is
>>probably worth experimenting with and getting an analysis of what would
>>enter into the glaze formula.
>>
>>Martin Howard
>>Webbs Cottage Pottery
>>Woolpits Road
>>Great Saling
>>BRAINTREE
>>Essex CM7 5DZ
>>martin@webbscottage.co.uk
>>
>
--
Steve Mills
Bath
UK
home e-mail: stevemills@mudslinger.demon.co.uk
work e-mail: stevemills@bathpotters.demon.co.uk
own website: http://www.mudslinger.demon.co.uk
BPS website: http://www.bathpotters.demon.co.uk
Tel: **44 (0)1225 311699
Fax: **44 (0)870 0526466
Ronan ORourke on fri 26 nov 99
Hi Steve,
I stand corrected. Looks like this is another one of those commonly
misused terms (clay instead of body etc).
I will try to stick to the more universal "soft brick" in future.
BFN Ronan
-----Original Message-----
From: Stephen Mills
To: CLAYART@LSV.UKY.EDU
Date: 24 November 1999 13:51
Subject: finding basalt /was Ash washing & Jeff Campana's posting --
----------------------------Original message----------------------------
With respect:
HTI or HT1 bricks were a hard white fire brick made originally some
years ago by Gibbons Askam in the UK, not to be confused with K23 etc.
which are a lighter and much softer insulating brick manufactured in the
USA.
My first Kiln was built with HTI's in the early '60s, so when I got it
in '67 it had already seen some hard labour. It put another 14 or so
years under its belt before it gave way to Board and Fibre.
Steve
Bath
UK
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