Glazed brick.... can't say I've encountered. I've see lots of glazed tile. Sometimes it would be fairly thick tile but it would be what I consider tile and not brick.... granted that could be just a language thing (my tile is what you consider brick).
Brick to me is typically thick blocks of coarse processed clay - occasionally with holes in it. Tile is a finer quality clay which can be also made into brick-like objects (usually thinner) and is glazed on from 1 to 6 sides. (usually glazed on only one side). Salt fired peices fall into the land of tile for me... I think the distinction for me is that brick is used to make it's own kiln and fired in that manner. If you place something in a kiln and add chemicals and other peices to the kiln you have pottery or tile. A note on salt firing: One of the other reasons salt firings are not common (aside from the chlorine gas... trust me there is lots of other bad stuff put out by a pottery Cl2 is the least of the worries) is that salt actually causes the bricks of the kiln to errode. So for a wood fired kiln you rebuild the kiln every couple years if you are firing it regularly. You can't (or shouldn't) salt fire in an electric kiln because you essentially glaze the whole kiln and everything inside it, and the salt over time eats away at all the metal components. Since potteries have almost universally have moved to electric kilns - because you have much more (and finer) control of the heating and cooling cycles salt firings have become almost non-existant. The method for salt firing - heat kiln up with pottery inside. Once at a high enough temp add salt through a very small opening (close opening). The salt will vapourize and coat everything inside the kiln. Once the salt is all vapour, close kiln up and maintain heat for a short time, then allow to cool. Open kiln and chip pottery off the shelves. There are some very distinctive marks you get from salt fired peices because the peices are exposed to a vapour rather then the salt being in the glaze itself. Also - take it from personal experience - do not stand up wind from your wood fired kiln when adding salt to it.... or you will gas yourself. ;) -Sue --- On Tue, 11/2/10, David Scheidt <[email protected]> wrote: > From: David Scheidt <[email protected]> > Subject: Re: [gurps] A question about Bricks > To: "The GURPSnet mailing list" <[email protected]> > Received: Tuesday, November 2, 2010, 12:11 PM > On Tue, Nov 2, 2010 at 12:54 PM, > Susan Koziel > <[email protected]> > wrote: > > I know no one who glazes brick. > > That would be a waste of money. > > it's pretty ancient technology. The Assyrians and > Babylonians used > them. One of the reasons that Ishtar gate was a > wonder of the world > were the mosaics done on it, using glazed brick. > > Salt-glazed bricks, which used plain salt as a glaze, were > quite > common in the US in the early part of the 20th > century. The > elementary school I went to, built in the 30s, had all of > its interior > brickwork in salt-glazed brick. > > Salt-glazed bricks are no longer available, except as > salvage, because > of environmental rules. (It's considered bad form to > release huge > plumes of chlorine gas...) But the commercial marketplace > offers a > huge range of other glazed bricks. The brickyard here > used to have a > display wall built as a spectrum, showing off the colors > available > from one their suppliers. It had 100 colors or so. > > As you note, it's expensive, so they're usually only used > for faces, > and usually for decorative effects. (Though I've seen > public > restrooms made of glazed brick, where it takes the place of > tile.) > > -- > David Scheidt > [email protected] > _______________________________________________ > GurpsNet-L mailing list <[email protected]> > http://mail.sjgames.com/mailman/listinfo/gurpsnet-l > _______________________________________________ GurpsNet-L mailing list <[email protected]> http://mail.sjgames.com/mailman/listinfo/gurpsnet-l
