Jump to content


Member Since 26 Aug 2012
Offline Last Active Yesterday, 11:08 PM

Topics I've Started

Claywork While Going Thru Chemo

11 February 2016 - 05:32 PM

I have a couple friends who have recently been diagnosed with cancer. Both will be starting the chemo regimen.  Neither will  work while going thru chemo, and they are focused on keeping positive thoughts and staying as active as their health will allow.  Both have a bit of clay experience and have wondered about working in the clay studio at our local art center.  I feel that the studio would be a calming and relaxing place for them but whether they work in the studio or at home with clay, I have concerns about possible negative health effects since the chemo will cause changes in their immune system.  Because of the dust concerns as well as mold (in clay) etc., should I suggest they perhaps explore a different art medium for now?

Double Dip Flakes Off When Drying

01 August 2015 - 06:26 PM

A question for those who have the experience and knowledge….


A couple days ago I mixed up a batch of ‘Cobalt Blue’ for cone 10 and stoneware clay.  I have mixed and used this glaze before and never had problems.  However this time, when the glaze dries, it is extremely powdery.  It adheres well but I can easily brush off the drips while I would usually carefully shave the drips with a tool. My bigger problem is that when I dip the top edge of my cup in another glaze I usually use, the 2nd glaze cracks and easily falls off.  This double dip is a method I have used before and it worked beautifully with the glazes involved.  I also tried the 2nd dip using another glaze, with the same flaky  results, so I assume the problem is with my cobalt glaze.  I did fire a piece with the cobalt glaze only and the color and thickness showed no problems.

Here is the Cobalt Blue glaze recipe:

Custer feldspar             48.2

Flint                               24.1

Whiting                            7.7

Dolomite                          4.8

Gerstley Borate               4.8

Barium Carbonate           4.8

Zinc oxide – calcined       2.4

Tin Oxide                           .9

Copper                            1.9

Cobalt oxide                     2


Any educated guesses as to what I did wrong?  Can you suggest an easy fix or is recycle bin my easy fix? 

Thanks for all the help those of you share on this forum!


Oxygen Sensor/probe - Commercial Vs Homemade Auto Sensor

13 April 2015 - 10:36 AM

As I consider how I am going to 'improve my pottery' this year, I consider purchasing an oxygen sensor, however the price is a BIG consideration.  I fire an Olympic torchbearer, an updraft kiln, using LP to cone 10.  For the past 6 years I have used a sensor made from a Bosch auto sensor (Roger Graham directions).  It has allowed me to get reduction in my kiln but it is spotty and I feel I have little or no control over it.  I realize that weather conditions play a huge part in a successful firing and I am wondering if the cost of the new sensor will be justified thru better LP usage, more even reduction and more control over my (reduction) firings. Pottery is more than a hobby, but not a full time job, yet I do a couple shows a year and my pieces sell in a couple local stores - I see the payback as spread over a couple years. 


Input from those with knowledge and experience with oxy sensors will be appreciated.  I find only 2 on the market and cost ranges from $800-1200 so please give your best suggestions.