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Min

Member Since 31 Mar 2010
Offline Last Active Today, 06:05 PM
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Topics I've Started

Element Support Tubes

12 February 2017 - 04:52 PM

Anybody know anything about the pros and cons of supporting kiln elements like they do in some kilns from european and asian countries? My first thought is the likelihood of banging into them with a shelf, higher manufacturing costs and more labour intensive to change elements? Seems the heat loss into the softbricks would be less therefore resulting in lower operating costs. I'm thinking there has to be a reason they are being made like this. The Nabertherm one in the picture below is rated to 1340C.N1500_fmt.jpg

 


Clay Vs Glaze Coe Figures?

03 January 2017 - 01:44 PM

I’ve been running glaze tests on Laguna’s WC-429, I contacted Laguna and was told by Jonathan Pacini that the COE figure (using their methods of testing) is 4.60 x 10 -6. My question is what is a reasonable expectation of a COE maximum figure for a clear glaze to fit this? My current low COE glazes are in the 5.7 area. When I shock tested them they appeared to survive on this clay without crazing but I'm not 100% sure since it's so hard to see crazing on a dark body.

 

Wondering if anybody has run tests comparing clay COE figures with glaze COE and come up with any data on a range where the glaze still fits.  I know that glaze calc COE’s only get you so far and some glazes with a higher COE might fit whereas lower ones don’t always do due to the family of fluxes used but just asking in general terms here. Even glaze coe versus published clay coe figures would be helpful for me to determine a working range of figures.

 

(I asked Laguna for sample glaze recipes that would fit and their commercial MS 29 was suggested, I’m not using commercial glaze though so that was no help) 

 

Any thoughts or insight? Thanks in advance for any help.

 

edit: I know I should run a series of tests from lower to higher coe's but am trying to find out if anyone knows of a window range? Trying to come up with a coe under 5 would be fun.


Silicone Caulking Cure Time?

01 December 2016 - 05:42 PM

I have to stick metal bearings on the bottom of pots, I usually use E6000 but I don't have time for it to dry for this batch. I'm using clear 100% silicone instead this time. Anybody know how long before it cures? The only info I could find was for caulking a 3/16 bead it takes 24 hours usually. Problem is my application won't be open to the air so I'm guessing cure time is longer? These metal parts need to be vertical without sliding for my display.

 

Thanks in advance for any advise, help or just hunches.

 


Throwers Sign Language?

13 September 2016 - 10:50 AM

I stumbled across these images of hand positions while throwing, from tortus - copenhagen. Thought they were beautifully done. You can see the clay even though its not there.

 

 


Zircopax Kiln Shelf

22 June 2016 - 03:01 PM

This looks interesting, if you could get the zircopax for a decent price. Be nice to have an alternative to Advancers or Corelites for lighter shelves, plus to be able to make ones own.

 

(ps, HighBridge, there is a little bit on bubbles in glazes 1/2 way down the same page)

 

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