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RonSa

Member Since 21 Oct 2016
Offline Last Active Today, 05:35 PM
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Topics I've Started

Gray Areas In Fired Glazes

13 May 2017 - 05:46 PM

I was wondering why glazes sometimes have grayish areas after firing?  This has happened with a couple of different clay bodies (standard 112, 211 and 225) and two different glazes (coyote oxblood and amaco oatmeal). I'm pouring the glaze onto/into the bisqueware

 

I'm firing to ^6 with a sitter

1 hour on low

1 hour on meduim

remainder on hi-fire

holding for 8 minutes after the sitter falls


Alumina Hydrate, Alumina Reactive & Aluminium Hydroxide

11 May 2017 - 06:49 PM

Are Alumina Hydrate, Alumina Reactive &  Aluminum hydroxide the same thing? If not which is the one used as part of kilnwash?


Standard's 630 White Stoneware?

07 May 2017 - 05:47 PM

Has anybody have experience with this clay?

 

I just opened a bag yesterday and it was the wettest, most fluid clay I've thrown. The first pot slumped while it was still on the wheel. I didn't think I was throwing that thin, no thinner than normal but I guess I was. After wedging and trying two more times, drying the clay more each time,  I finally finished one.

 

The next three lumps went better, but this clay has an attitude.

 

Today I went to trim and found they were too wet. They sat overnight in a room with a dehumidifier, even though maybe it was all this rain. So I took a hair dryer to the pots to stiffen them up.When I got them on the wheel I found all four slumped a little while drying. Definitely fussy with an attitude.

 

Extruded some handles with my new homemade handheld extruder. Clay almost wanted to fly out. I usually pull handles first before trimming so the can dry out a bit. I did the same even though I figured with no water from pulling that they should be ready sooner.

 

A few hours later they were still wet (think cooked wet spaghetti limp) so I took a hair dryer to them  What seemed like 30 seconds later the handles were to hard. I could see them cracking when I bend them so I sprayed a little water to the clay. Now they are too wet again.

 

Fussy, annoying and an attitude.

 

Is this normal for this clay? I can't imagine what porcelain is like.


Plate Rack/stilt/stand

01 May 2017 - 09:56 AM

My wife is interested in making stoneware plates and I'm looking into ways to fire them. I was thinking of firing them on their sides like tiles but I see a problem when glaze firing to ^6.

 

Maybe placing some on posts of varying heights but"m concerned with the posts leaving an impression.

 

Maybe I need more shelves? This is something I'm hoping to avoid.

 

Thanks in advance


Underglazes And Such

01 May 2017 - 09:48 AM

My wife is interested in painting designs on her pots and is looking at underglazes. Unless we're missing something all the products I'm finding is low fire and we glaze fire at ^6.

 

If there is a ^6 undergalze available can you recommend a brand?

 

Thanks in advance.