WarmGlass.com

tell me and I'll include it
-lauri

Bert,
I tired the 20/80 receipe for relief moulds in frit casting..

Perfect release BUT as the cullets/ frit melted down,
they pushed some perimer ahead, giving a slightly
patterned look. With fine grit this is not really visible,
with cullets there remains a map.

Under a blank it must be OK.
-lauri

Brian keeps reminding that devit occurs only within a narrow temp zone. Hot enough that the atoms can arrange to crystal lattice, coll enough that the movement of glass prevents formation of solid crystals. My understanding is that a pot casting is very safe, because the glass is in movement all the...

After thinking overnight I remembered one more caveat. If you take the final mould from plasticine, please note that plasticine is oil based. Some of this oil may seep into your mould. It is better to burn the oil residue out before casting. If you are frit casting, nad ramp up slowly I expect the o...

Bentonite is one, CMC is another.
The difference is that CMC burns out and gasses,
bentonite stays in the mix, but may stick to the glass if
used too much.

-lauri

Small moulds can be made by pouring into a box. That can be done in one stage. Sometimes it is not practical, but the mould is built up around the piece. The process starts by splashing wet plaster over the original. The purpose is to provide an inner surface to the mould without bubbles or voids. S...

Plasticine clay, plaster and waterbased clay do not stick to each other. Im nodeling I work in waterbased clay. If I need a partitioned mould, I build the wall of plasticine. over the clay piece. Then I cast the first side, remove the wall, add release soap to the seam and cast the second part. Hard...

As a newbie, it feel terrible to challence an authority: Okay, it's in his Glass Myths section, and reads: 5. Glasscutting is easier with a specific fluid (usually petroleum based) applied to the glass This one is mostly true: but it is not so much the type of fluid as it's molecular size. Many liqu...

Thanks Gred

for a wealth of sober information.
May I include a link in the WG dictionary
under safety?

-lauri

Kiln sitter seems like a reliable safety device. My kiln has two set of relays serially. This is an European requirement. One set is operated by the controller, the other set is triggered by - door switch, cutting off if the kiln is opened -if the thermocouple detects a temperature 20 deg C over the...

Hi-fire is not yet in the dictionary.
Do I gyessw correct
- it is a form of frit casting to produce a flat blank for further use?

-lauri

I have a separate meter for my kiln, and keep track of the consumption. My kiln is rated at 10 kW. A frit cast session of reasonably thin piece takes about 20 to 28 hours. Simple math says I am consuming 200 to 280 kWh. The meter says I have used only 24 to 35 kWh. Read this so that my kiln is ON on...

We have a forum for photos &stuff. Great place to announce your first success. I'll do it very soon, maybe next year :-) That is the place to welcome newbies, to share ideas. Does it benfit of a parallel critics forum, where people who want, can open their work for criticism, dialog etc. If I fi...

Bert, what didi you reallyask about freezing. When you buy it dry, as a powder od dust, it does not freeze. After adding the water it is different. The water will freeze at some point, forming crystals. Does it leave the alumina out to settle after thawing? (Some people here distill denaturated alco...

atershed Joined: 12 Mar 2003 Posts: 173 Posted: Mon Mar 22, 2004 3:26 am Post subject: OK, just for the dictionary-esque definitions. Quartz: Pure ish silica crystals (this is the most dicey, please correct if necessary) Silicon: And element on the periodical table, mostly found in various combinati...

Dadll you had a very difficult thermal distribution. Part of the shelf was exposed to direct IR radiation. The middle was ahadowed by the plate that absorbs its share of heat. The talc which is conteins much air was an insulator. On the way down the roles were reversed, the edges of the shelf were f...

The next revision I'll like to send to you first for proof reading. I know my English is awkward,
not to speak about my typing skills.

-lauri

Contrary to a suggestion abowe
DO NOT insert pyrometer during firing!
Switc off the power for that moment.

-lauri

I know the wikipedia, though I have no hands on experience on it. It was in my mind to put the dictionary in it. As Brad mentioned, 100 persons editing the draft may cause more confusion. maybe when we have something stabilized... The greatest worry is forth and back editing. We have already argumen...

Great you joined in. 1. I have discussed with Brad that it is possible to link further into archives. F.ex: Powder wafer - (definition) Read further (link to Bob leatherbarrow*s posting. This will take time to find out proper postings. 2. As I have a limited access to original sources . living in co...