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Celia UK

Member Since 01 Jul 2012
Offline Last Active Today, 04:38 AM
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Posts I've Made

In Topic: Small Kiln In House (Not Garage Or Basement)

Today, 04:28 AM

My small kilns - 40 litre and 60 litre (less than 2.5 cu ft) are in the garage. I only ever run one at a time. Worst thing I notice is fumes around the 250-350oC (480-650 oF) mark. I'm not paranoid about venting and have none except normal garage draughts or sometimes leaving door propped open. However - I totally avoid going into the garage at the above temperatures because I suspect these fumes aren't good ones! (Think I may have read carbon monoxide somewhere, but I might have imagined that!) I wouldn't think they'd do much good inside the house, even if you're not working in the room at the same time. I think you'd want something extracting them out so they don't leak into the house.
This is only my experience - for all I know they may smell awful but be safe enough.

In Topic: New Teacher ..help!

27 November 2016 - 07:05 PM

My advice would be to make some 'damp boxes' to store pieces from one week to the next. Large, lidded plastic box with about a 1" thick layer of plaster in the bottom. Several of these can stack and the work can be stored for weeks without drying out. Saves all that wrapping in polythene and spraying - I only discovered these after I retired from teaching and wished I'd known about them before. I have several in my home studio so I don't have to worry about pieces drying out before I can get back to finishing them. Google 'magic box for clay' and/or Tim See for YouTube video showing how to make.
Red/brown earthenware is a nightmare to clean up and stains everything! I'd stick to clay if I were you.
You definitely need some one session projects so that the students get to see results quickly - certainly in the beginning! It keeps them interested if they get to see a finished pieces quite quickly initially. They'll be happier to take longer over subsequent projects.

Try every idea out yourself first - you'll work out the difficulties in advance AND have a finished product as a teaching aid and motivator for the students! Have an 'extension' activity/idea up your sleeve for students who whizz through at a record pace - there's always one!
Don't underestimate the time it takes to clear up - get the students into good habits and be a good timekeeper yourself, otherwise you'll spend more time clearing up than you do teaching!

Agree with the 'candling' in the kiln suggested above. The one and only time I had work 'explode' in the kiln was because I'd been in too much of a hurry and a piece wasn't completely dry.
Good luck and enjoy!

In Topic: Is Cone 6 Practical For Domestic Ware In The Uk?

22 November 2016 - 01:11 PM

Oly - if you give Valentines a ring they're always very happy to advise. Similarly Potclays and Potterycrafts. I'm just firing some stoneware B17C to 1200oC with a 30 minute soak. I don't usually use stoneware, this was from a throwing weekend I attended a few months back. Hopefully they'll survive AND be leakproof as there are some mugs and a vase in there. Having read your post I'll definitely do a leak test before using any of them!

In Topic: Stoneware Glaze Unexpectedly Crazing :(

18 November 2016 - 05:15 PM


 
Incidentally, where I have used this glaze but with addition of very small amounts of oxides (nickel and cobalt), I seem to have escaped without the crazing.[/quote]

Oxides definitely make a difference to the glaze formula - others will know if it's the expansion - that will be why they didn't craze. This glazing business is very frustrating....I sympathise Oly.

In Topic: Qotw: Ceramics In Action Pictures Anybody?

13 October 2016 - 01:54 AM

I don't generally consider my pots to be functional because of the way I alter them - cut, distort, carve holes etc. but a friend sent me this photo of two pieces she won as prizes at the golf club. Quite ingenious to use plants that grow in gravel I thought!