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JessicaGrayCeramics

Member Since 06 Jan 2013
Offline Last Active Sep 15 2013 09:04 PM
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Posts I've Made

In Topic: First Firing Of A Used Kiln?

15 September 2013 - 08:28 PM

Doing a test firing is a great idea. However, as someone who has bought, used and rebuilt new-to-you kilns I need to strongly emphasize you should never leave a new-to-you kiln unattended until it has been tested. You need to make sure it fires off properly. I have never had a used kiln I purchased fire off properly the first time. The person you purchased the kiln from may say it works properly, but that is usually not the case. It is not safe to leave a used kiln until you know it works properly. I recommend watching the kiln for the entire firing at least a few firings. Make sure to watch the kiln, check the breaker or fuse box, wiring and wall if the kiln is plugged into the wall.You want to make sure none of these parts are getting warmer than they should. Be very cautious when first firing a used but new-to-you kiln. It may smell hot,but it should not smell like something burning. It is generally a good rule of thumb to always be around when firing a kiln for safety.


In Topic: Wanted to share this tile technique...

17 March 2013 - 10:50 AM

GREAT IDEA! I love it, thank you for sharing.:)src="http://ceramicartsda...ult/smile.gif">

In Topic: replacing kiln elements

09 February 2013 - 07:17 AM

For the elements, the gauge and length of the elements are really all you'll need to worry about. Measure out the length covered by each one along the grooves in the bricks and nearly any manufacturer or element specialist can get you what you need. Are you certain you even need new elements? Once you have the wire gauge and length, you can test for resistance to see if the element is within tolerance. My website has a tutorial for testing elements. Most kilns around that size should be reading near 25 Ohms on each element, give or take 2.5 Ohms.


The Orton Autofire 3000 Operates at 24V AC input. This info can be quite helpful in figuring out what input voltage you should have.
If you could have someone trace the wiring from the inputs on the controller to the transformer that supplies it, that would help figure out the source voltage. For instance, you're likely looking at a 10:1 transformer, meaning 220 to 240V.

On a sitter related note, the sitter is capable of cone 12. Not sure about your particular kiln though.

We've dealt with quite a bit of older equipment and have overcome the "who made this" problem in the past. Luckily, these things are full of fairly universal parts.

In Topic: when to underglaze

03 February 2013 - 05:34 AM


You could apply them to clay that is on the workable side, you would just have to be more careful, especially if you are applying it with a stiffer brush, that could put more pressure on the clay surface. Also, I would imagine, that if the clay was really wet, the underglaze could bleed a bit, and you'd lose some precision. Personally, I don't apply underglaze, until the clay is leatherhard.



Thanks for the input. A related question. I'm using Amaco's Velvet underglazes. All the literature I read says they can be fired succesfully at cone 6. The info on the jars say cone 05-04. Did I get the wrong underglases or will this work?


Mark


Mark,

Even though they say cone 05-04 some of the colors do work well at cone 6. It is a hit and miss thing. Different colors have different results at cone 6. I recommend as with most glazes do a test before using it on your actual work. Sometimes the bottle will tell you they work okay up to cone 6, sometimes it will not. It is best to test it on a sample tile of like texture to your work. I might also add you may want to put a little punched bowl underneath the sample in the kiln in case it would for some crazy reason completely melt and run really bad. This should not be the case, but it is best to be prepared. Good luck.

In Topic: computer inventory list with pictures?

26 January 2013 - 05:30 AM

If you're really zealous about tracking, you can shape it into a marketing tool. I use a similar sheet to track my inventory and who buys it. It's useful to send out emails to your customers when you're doing shows and sales and when you have a piece you think they might like.