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Member Since 28 Jun 2010
Offline Last Active Yesterday, 09:01 PM

#126674 Gray Areas In Fired Glazes

Posted by bciskepottery on 14 May 2017 - 09:33 AM

I believe the cause is glaze thickness.  Some glazes are very sensitive to thickness of application, with the result being cloudiness or different color.  For those glazes that are application sensitive, the clay body or firing schedule is immaterial.  Thicker/thinner areas will appear to be different colors/shades.  Comes down to the ingredients in the glaze . . . which are uncertain here because they are commercial glazes.  Work on getting your glaze to a better application consistency so there are not overlaps or drips that cause unevenness in application. 

#126424 Brush Hairs Leaving Behind A Line On Finished Product,

Posted by bciskepottery on 09 May 2017 - 05:14 AM

Glaze compression. If the brush hairs were on the surface of the glaze, they would likely burn off during firing. But, they are trapped between the underglaze and your clear glaze. So, even as the hair burns out, the glaze shrinks/compresses during firing to the shape/texture of what is below it . . .

Could be the brush is getting old. Check for loose brush hairs before underglazing. Check for lost hairs before applying the glaze. Or, apply the underglaze to greenware and let the bisque burn out any hairs.

#126258 Nine Warning Signs Of An Amateur Artist

Posted by bciskepottery on 06 May 2017 - 08:11 AM

The bias and snobbery is evident in the article title . . . warning real artists that amateurs are persons to be avoided and how to detect them. I have no problem admitting to being an amateur potter because that is what I am. No more, no less.

#125645 Studio Clean Up Question ( Wheel Throwing )

Posted by bciskepottery on 21 April 2017 - 04:38 PM

You can hand wash clay towels in a bucket of water before putting them in the regular wash or hose them off on the patio or drive way.

#125574 G 200, G 200 Hp And What Else.

Posted by bciskepottery on 19 April 2017 - 07:21 PM


#124681 Glaze Melding

Posted by bciskepottery on 02 April 2017 - 09:27 AM

If you are glazing front and back, you could use kiln stilts to place the items on.  Items should pop off, but you may need to grind down any pin marks left by the stilts.


If the back is not glazed but sticking to the kiln shelf, you can either put kiln wash on the shelves to prevent sticking (or plucking).  Even then, if the sides of your items are glazed, you may still want to use stilts.

#124668 Clear Glaze Chemistry

Posted by bciskepottery on 02 April 2017 - 05:38 AM

Pete Pinnell has a column in the new Spring/Summer Clay Times on "Dealing with Bubble Troubles." They are offering free access to the digital magazine through 4/15.  http://www.claytimes.com/


He offers some good suggestions on dealing with the problem.  Page 23. 

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#124320 Recycling Clay - Turns Black And Stinky

Posted by bciskepottery on 26 March 2017 - 04:24 PM



Is it possible you have gotten some organic material in the clay?




Paper towels are inorganic.  Most likely organic matter:  skin cells from the potters, sweat. 



Paper towels are organic. Paper is made from trees, unless of course you are talking about plastic trees :), then you are right.  :D



Yep.  You and Pres are correct.  Which explains why I transferred out of chemistry before failing the course. 

#124036 Cap'n Cavy Progress Photos (Help?)

Posted by bciskepottery on 19 March 2017 - 03:09 PM

Margaret Ford did the porcelain kimonos . . .




#123881 Tung Oil Or Bees Wax

Posted by bciskepottery on 16 March 2017 - 07:41 PM

My plywood wedging table tops are unfinished.  Sponged down at end of day.  I also use unfinished plywood for ware boards. 

#123702 That Time Is Approaching... How Hard Is It To Change Elements On An Olympic K...

Posted by bciskepottery on 13 March 2017 - 08:31 PM

Might be worthwhile to hire the person, then watch him change the elements . . . or better yet, let you help him change the elements. 


Also think about swapping out thermocouples and, possibly, relays. 


Good preventive maintenance reduces problems later on. 

#123197 Qotw: Are You Afraid Of The White Gold?

Posted by bciskepottery on 03 March 2017 - 09:18 PM

White gold -- fool's gold.  I mostly use slaked down porcelain as a slip.  Have thrown some to say I've done so.  Stoneware guy, here . . . preferably dark colored clay. 

#123196 Wooden Ribs And Rollers

Posted by bciskepottery on 03 March 2017 - 09:16 PM

My wooden ribs and tools are going on 9 years old . . . just clean them when done, no other special treatment.

#122865 What Exactly Is Shino

Posted by bciskepottery on 24 February 2017 - 10:53 AM

Forget about Wikipedia . . . start here: https://euancraig.bl...s-of-shino.html

There are the Japanese shinos . . . very traditional. And, there are American shinos . . . very different, google for Malcolm Davis to see his work on carbon-trapping shinos. You can spend a lifetime in pursuit of shino, google Hank Murrow. Same differences as Japanese raku and American raku.

What is offered in stores in pre-mixed containers of all the rainbow's colors are not shinos. Same for their celadons. They are just nice (mostly) looking glazes that have the apparent look of the originals.

#122772 Resist Over Glaze?

Posted by bciskepottery on 22 February 2017 - 08:09 PM

Ask Hamada. He did it for years.

Only if you are into séances.